PERMANENT RULES
Effective Date of Rule: July 1, 2010.
Purpose: To adopt and amend the 2009 Edition of the Uniform Plumbing Code, chapter 51-56 WAC.
Citation of Existing Rules Affected by this Order: Amending WAC 51-56-003, 51-56-008, 51-56-0200, 51-56-0300, 51-56-0400, 51-56-0500, 51-56-0600, 51-56-0700, 51-56-0900, 51-56-1300, 51-56-1400, and 51-56-1600.
Statutory Authority for Adoption: RCW 19.27.074 and 19.27.031.
Other Authority: Chapters 19.27 and 34.05 RCW.
Adopted under notice filed as WSR 09-17-143 on August 19, 2009.
Changes Other than Editing from Proposed to Adopted Version: Section 908.2.1 was amended to include a sentence from the model code language requiring that water closets be connected downstream of other fixtures when using a wet vent system.
Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 0, Amended 0, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.
Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, Amended 12, Repealed 0.
Number of Sections Adopted on the Agency's Own Initiative: New 0, Amended 0, Repealed 0.
Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, Amended 0, Repealed 0.
Number of Sections Adopted Using Negotiated Rule Making: New 0, Amended 0, Repealed 0; Pilot Rule Making: New 0, Amended 0, Repealed 0; or Other Alternative Rule Making: New 0, Amended 12, Repealed 0.
Date Adopted: November 12, 2009.
Peter D. DeVries
Council Chair
OTS-2533.3
AMENDATORY SECTION(Amending WSR 07-01-094, filed 12/19/06,
effective 7/1/07)
WAC 51-56-003
Uniform Plumbing Code.
The ((2006)) 2009
edition of the Uniform Plumbing Code, published by the
International Association of Plumbing and Mechanical
Officials, is hereby adopted by reference with the following
additions, deletions and exceptions: Provided that chapters
12 and 15 of this code are not adopted. Provided further,
that those requirements of the Uniform Plumbing Code relating
to venting and combustion air of fuel fired appliances as
found in chapter 5 and those portions of the code addressing
building sewers are not adopted.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-003, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-003, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-003, filed 12/18/01, effective 7/1/02.]
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-008, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-008, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-008, filed 12/18/01, effective 7/1/02.]
205.0 Certified Backflow Assembly Tester - A person certified
by the Washington state department of health under chapter 246-292 WAC to inspect (for correct installation and approval
status) and test (for proper operation) approved backflow
assemblies.
210.0 Hot Water - ((This definition is not adopted.)) Water at
a temperature exceeding or equal to 100ºF.
218.0 Plumbing System - Includes all potable water, building
supply and distribution pipes, all reclaimed water systems,
all plumbing fixtures and traps, all drainage and vent
pipe(s), and all building drains including their respective
joints and connection, devices, receptors, and appurtenances
within the property lines of the premises and shall include
potable water piping, potable water treating or using
equipment, medical gas and medical vacuum systems, and water
heaters: Provided, That no certification shall be required
for the installation of a plumbing system within the property
lines and outside a building.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0200, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-0200, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-0200, filed 12/18/01, effective 7/1/02.]
301.1.3 Standards. Standards listed or referred to in this
chapter or other chapters cover materials which will conform
to the requirements of this code, when used in accordance with
the limitations imposed in this or other chapters thereof and
their listing. Where a standard covers materials of various
grades, weights, quality, or configurations, there may be only
a portion of the listed standard which is applicable. Design
and materials for special conditions or materials not provided
for herein are allowed to be used by special permission of the
authority having jurisdiction after the authority having
jurisdiction has been satisfied as to their adequacy in
accordance with Section 301.2.
311.4 Except as hereinafter provided in Sections 908.0, 909.0,
910.0, and Appendix L((, Section L 6.0, 7.0 and 8.0)), no vent
pipe shall be used as a soil or waste pipe, nor shall any soil
or waste pipe be used as a vent.
313.6 No water, soil, or waste pipe shall be installed or
permitted outside of a building or in an exterior wall unless,
where necessary, adequate provision is made to protect such
pipe from freezing. All hot and cold water pipes installed
outside the conditioned space shall be insulated to a minimum
R-3.
313.7 All pipe penetrating floor/ceiling assemblies and
fire-resistance rated walls or partitions shall be protected
in accordance with the requirements of the building code.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0300, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-0300, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-0300, filed 12/18/01, effective 7/1/02.]
402.0 Water-Conserving Fixtures and Fittings.
402.1 The purpose of this section shall be to implement water
conservation performance standards in accordance with RCW 19.27.170.
402.2 Application. This section shall apply to all new
construction and all remodeling involving replacement of
plumbing fixtures and fittings in all residential, hotel,
motel, school, industrial, commercial use, or other
occupancies determined by the council to use significant
quantities of water. Plumbing fixtures, fittings and
appurtenances shall conform to the standards specified in this
section and shall be provided with an adequate supply of
potable water to flush and keep the fixtures in a clean and
sanitary condition without danger of backflow or
cross-connection.
402.3 Water Efficiency Standards.
402.3.1 Standards for Vitreous China Plumbing Fixtures.
402.3.1.1 The following standards shall be adopted as plumbing
materials, performance standards, and labeling standards for
water closets and urinals. Water closets and urinals shall
meet either the ANSI/ASME standards or the CSA standard.
| ANSI/ASME A112.19.2M-1998 | Vitreous China Plumbing Fixtures |
| ANSI/ASME A112.19.6-1995 | Hydraulic Requirements for Water Closets and Urinals |
| CSA B45 | CSA Standards on Plumbing Fixtures |
| Tank-type toilets | 1.6 gpf/6.0 lpf |
| Flushometer-valve toilets | 1.6 gpf/6.0 lpf |
| Flushometer-tank toilets | 1.6 gpf/6.0 lpf |
| Electromechanical hydraulic toilets | 1.6 gpf/6.0 lpf |
| EXCEPTIONS: | 1. Water closets located in day care centers, intended for use by young children may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. |
| 2. Water closets with bed pan washers may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. | |
| 3. Blow out bowls, as defined in ANSI/ASME A112.19.2M, Section 5.1.2.3 may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. |
402.3.1.3.1 Nonwater Urinals. Nonwater urinals shall be
listed and comply with the applicable standards referenced in
Table 14-1. Nonwater urinals shall have a barrier liquid
sealant to maintain a trap seal. Nonwater urinals shall
permit the uninhibited flow of waste through the urinal to the
sanitary drainage system. Nonwater urinals shall be cleaned
and maintained in accordance with the manufacturer's
instructions after installation. Where nonwater urinals are
installed, they shall have a water distribution line rough-in
to the urinal location to allow for the installation of an
approved backflow prevention device in the event of a
retrofit.
402.3.1.4 No urinal or water closet that operates on a
continuous flow or continuous flush basis shall be permitted.
402.3.1.5 This section does not apply to fixtures installed
before the effective date of this Section, that are removed
and relocated to another room or area of the same building
after the effective date of this Section.
402.3.2 Standards for Plumbing Fixture Fittings.
402.3.2.1 The following standards are adopted as plumbing
material, performance requirements, and labeling standards for
plumbing fixture fittings. Faucets, aerators, and shower
heads shall meet either the ANSI/ASME standard or the CSA
standard.
| ANSI/ASME A112.18.1M-1996 | Plumbing Fixture Fittings |
| CSA B125 | Plumbing Fittings |
| EXCEPTION: | Emergency use showers shall be exempt from the maximum water usage rates. |
| Lavatory faucets | 2.5 gpm/9.5 lpm |
| Kitchen faucets | 2.5 gpm/9.5 lpm |
| Replacement aerators | 2.5 gpm/9.5 lpm |
| Public lavatory faucets other than metering | 0.5 gpm/1.9 lpm |
| EXCEPTIONS: | 1. Where designed and installed for use by persons with a disability. |
| 2. Where installed in day care centers, for use primarily by children under 6 years of age. |
402.5.1 The standards for water efficiency and labeling
contained within Section 402.3 shall be in effect as of July
1, 1993, as provided in RCW 19.27.170 and amended July 1,
1998.
402.5.2 No individual, public or private corporation, firm,
political subdivision, government agency, or other legal
entity, may, for purposes of use in the state of Washington,
distribute, sell, offer for sale, import, install, or approve
for installation any plumbing fixtures or fittings unless the
fixtures or fittings meet the standards as provided for in
this Section.
((Section 402.6 is not adopted.))
407.5 Setting. Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than fifteen (15) inches (381 mm) from its center to any side wall or obstruction nor closer than thirty (30) inches (762 mm) center to center to any similar fixture. The clear space in front of any water closet or bidet shall be not less than twenty-one (21) inches (533 mm). No urinal shall be set closer than twelve (12) inches (305 mm) from its center to any side wall or partition nor closer than twenty-four (24) inches (610 mm) center to center.
| EXCEPTION: | The installation of paper dispensers or accessibility grab bars shall not be considered obstructions. |
411.2.1 Toilet rooms containing two (2) or more water closets
or a combination of one (1) water closet and one (1) urinal,
except in a dwelling unit. The floor shall slope toward the
floor drains.
411.2.2 Laundry rooms in commercial buildings and common
laundry facilities in multifamily dwelling buildings.
411.7 Shower compartments, regardless of shape, shall have a
minimum finished interior of nine hundred (900) square inches
(0.58 m2) and shall also be capable of encompassing a thirty
inch (762 mm) circle. The minimum required area and
dimensions shall be measured at a height equal to the top of
the threshold and at a point tangent to its centerline. The
area and dimensions shall be maintained to a point of not less
than seventy (70) inches (1.778 mm) above the shower drain
outlet with no protrusions other than the fixture valve or
valves, shower head, soap dishes, shelves, and safety grab
bars or rails. Fold-down seats in accessible shower stalls
shall be permitted to protrude into the thirty (30) inch (762
mm) circle.
| EXCEPTIONS: | 1. Showers that are designed to comply with ICC/ANSI A117.1. |
| 2. The minimum required area and dimension shall not apply for a shower receptor having overall dimensions of not less than thirty (30) inches (762 mm) in width and sixty (60) inches (1,524 mm) in length. |
Sections 412.1 through ((412.7)) 412.6 and Table 4-1 are not
adopted.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0400, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-0400, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-0400, filed 12/18/01, effective 7/1/02.]
501.0 General. The regulations of this chapter shall govern
the construction, location, and installation of fuel burning
and other water heaters heating potable water. The minimum
capacity for water heaters shall be in accordance with the
first hour rating listed in Table 5-1. See the Mechanical
Code for combustion air and installation of all vents and
their connectors. All design, construction, and workmanship
shall be in conformity with accepted engineering practices,
manufacturer's installation instructions, and applicable
standards and shall be of such character as to secure the
results sought to be obtained by this Code. No water heater
shall be hereinafter installed which does not comply in all
respects with the type and model of each size thereof approved
by the authority having jurisdiction. A list of accepted gas
((equipment)) appliance standards is included in Table 14-1.
TABLE 5-11,3
| Number of Bathrooms | 1 to 1.5 | 2 to 2.5 | 3 to 3.5 | ||||||||
| Number of Bedrooms | 1 | 2 | 3 | 2 | 3 | 4 | 5 | 3 | 4 | 5 | 6 |
| First Hour Rating2, Gallons | 42 | 54 | 54 | 54 | 67 | 67 | 80 | 67 | 80 | 80 | 80 |
| Notes: | 1The first hour rating is found on the "Energy Guide" label. |
| 2Nonstorage and solar water heaters shall be sized to meet the appropriate first hour rating as shown in the table. | |
| 3For replacement water heaters, see Section 101.4.1.1.1. |
502.3 Chimney, Factory-Built – Delete definition.
502.4 Chimney, Masonry – Delete definition.
502.5 Chimney, Metal – Delete definition.
502.7 Direct Vent Appliance – Delete definition.
502.8 Flue Collar – Delete definition.
502.9 Gas Vent, Type B – Delete definition.
502.10 Gas Vent, Type L – Delete definition.
502.12 Vent – Delete definition.
502.13 Vent Connector – Delete definition.
502.14 Venting System – Delete definition.
504.1 Inspection of Chimneys or Vents. Delete paragraph.
505.1 Location. Water heater installation in bedrooms and
bathrooms shall comply with one of the following:
(1) Fuel-burning water heaters may be installed in a closet located in the bedroom or bathroom provided the closet is equipped with a listed, gasketed door assembly and a listed self-closing device. The self-closing door assembly shall meet the requirements of Section 505.1.1. The door assembly shall be installed with a threshold and bottom door seal and shall meet the requirements of Section 505.1.2. All combustion air for such installations shall be obtained from the outdoors in accordance with the International Mechanical Code. The closet shall be for the exclusive use of the water heater.
(2) Water heater shall be of the direct vent type.
506.2 All storage-type water heaters deriving heat from fuels
or types of energy other than gas, shall be provided with, in
addition to the primary temperature controls, an
over-temperature safety protection device constructed, listed,
and installed in accordance with nationally recognized
applicable standards for such devices and a combination
temperature and pressure relief valve.
507.0 Combustion Air. For issues relating to combustion air,
see the Mechanical Code.
Sections 507.1 through ((507.10)) 507.9 are not adopted.
Sections 508.6 through 508.9 are not adopted.
508.12 Delete entire section.
508.18 Venting of Flue Gases - Delete entire section.
Sections 508.20 through 508.24.5 are not adopted.
510.0 Venting of Equipment. Delete entire section.
511.0 Sizing of Category I Venting Systems. Delete entire
section.
512.0 Direct Vent Equipment. Delete entire section.
Chapter 5, Part II is not adopted.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0500, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-0500, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-0500, filed 12/18/01, effective 7/1/02.]
| EXCEPTION: | Listed fixtures that do not require water for their operation and are not connected to the water supply. |
603.0 Cross-Connection Control. Cross-connection control
shall be provided in accordance with the provisions of this
chapter. Devices or assemblies for protection of the public
water system must be models approved by the department of
health under WAC 246-290-490. The authority having
jurisdiction shall coordinate with the local water purveyor
where applicable in all matters concerning cross-connection
control within the property lines of the premises.
No person shall install any water operated equipment or mechanism, or use any water treating chemical or substance, if it is found that such equipment, mechanism, chemical or substance may cause pollution or contamination of the domestic water supply. Such equipment or mechanism may be permitted only when equipped with an approved backflow prevention device or assembly.
603.1 Approval of Devices or Assemblies. Before any device or
assembly is installed for the prevention of backflow, it shall
have first been approved by the authority having jurisdiction.
Devices or assemblies shall be tested for conformity with
recognized standards or other standards acceptable to the
authority having jurisdiction ((that are consistent with the
intent of this code)). Backflow prevention devices and
assemblies shall comply with Table 6-2, except for specific
applications and provisions as stated in Section 603.4 through
603.4.22.
All devices or assemblies installed in a potable water supply system for protection against backflow shall be maintained in good working condition by the person or persons having control of such devices or assemblies. Such devices or assemblies shall be tested in accordance with Section 603.3.3 and WAC 246-290-490. If found to be defective or inoperative, the device or assembly shall be replaced or repaired. No device or assembly shall be removed from use or relocated or other device or assembly substituted, without the approval of the authority having jurisdiction.
Testing shall be performed by a Washington state department of health certified backflow assembly tester.
TABLE 6-2
Backflow Prevention Devices, Assemblies and Methods
The following line is deleted from the table:
| Device, Assembly or Method | Applicable Standards | Pollution (Low Hazard) | Contamination (High Hazard) | Installation |
||
| Back Siphonage | Back Pressure | Back Siphonage | Back Pressure | |||
| Backflow preventer for carbonated beverage dispensers (two independent check valves with a vent to the atmosphere.) | ASSE 1022 | X | Installation includes carbonated beverage machines or dispensers. These devices operate under intermittent or continuous pressure conditions. | |||
(1) At the time of installation, repair or relocation; and
(2) At least on an annual schedule thereafter, unless more frequent testing is required by the authority having jurisdiction.
603.4.6.1 Potable water supplies to systems having no pumps or
connections for pumping equipment, and no chemical injection
or provisions for chemical injection, shall be protected from
backflow by one of the following devices:
(1) Atmospheric vacuum breaker.
(2) Pressure vacuum breaker.
(3) Spill-resistant pressure vacuum breaker.
(4) Reduced pressure backflow preventer.
(5) A double check valve may be allowed when approved by the water purveyor and the authority having jurisdiction.
603.4.10 Potable Water Make Up Connections to Steam or Hot
Water Boilers shall be protected by an air gap or a reduced
pressure principle backflow preventer.
603.4.12 Potable Water Supply to Carbonators shall be
protected by a listed reduced pressure principle backflow
preventer as approved by the authority having jurisdiction for
the specific use. The backflow preventer shall be located in
accordance with Section 603.3.4. The piping downstream of the
backflow preventer shall not be of copper, copper alloy, or
other material that is affected by carbon dioxide.
603.4.14 Backflow preventers shall not be located in any area
containing fumes or aerosols that are toxic, poisonous,
infectious, or corrosive.
603.4.16.1 Except as provided under Sections 603.4.16.2 and
603.4.16.3, potable water supplies to fire protection systems
that are normally under pressure, including but not limited to
standpipes and automatic sprinkler systems, except in one or
two family residential flow-through or combination sprinkler
systems piped in materials approved for potable water
distribution systems, shall be protected from back-pressure
and back-siphonage by one of the following testable devices:
1. Double check valve assembly.
2. Double check detector assembly.
3. Reduced pressure backflow preventer.
4. Reduced pressure detector assembly.
Potable water supplies to fire protection systems that are not
normally under pressure shall be protected from backflow and
shall meet the requirements of the appropriate standard(s)
referenced in Table 14-1.
((603.4.23 Potable Water Supply to Swimming Pools, Spas and
Hot Tubs shall be protected by an airgap or a reduced pressure
principle backflow preventer when:
(1) The unit is equipped with a submerged fill line; or
(2) The potable water supply is directly connected to the unit circulation system.))
604.15 Plastic water service piping may terminate within a
building, provided the connection to the potable water
distribution system shall be made as near as is practical to
the point of entry and shall be accessible. Barbed insert
fittings with hose clamps are prohibited as a transition
fitting within the building.
608.5 Relief valves located inside a building shall be
provided with a drain, not smaller than the relief valve
outlet, of galvanized steel, hard drawn copper piping and
fittings, CPVC, or listed relief valve drain tube with
fittings which will not reduce the internal bore of the pipe
or tubing (straight lengths as opposed to coils) and shall
extend from the valve to the outside of the building, with the
end of the pipe not more than two (2) feet (610 mm) nor less
than six (6) inches (152 mm) above the ground or the flood
level of the area receiving the discharge and pointing
downward. Such drains may terminate at other approved
locations. No part of such drain pipe shall be trapped or
subject to freezing. The terminal end of the drain pipe shall
not be threaded.
| EXCEPTION: | Replacement water heating equipment shall only be required to provide a drain pointing downward from the relief valve to extend between two feet (610 mm) and six inches (152 mm) from the floor. No additional floor drain need be provided. |
Listed parallel water distribution systems shall be installed in accordance with their listing.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0600, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-0600, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-0600, filed 12/18/01, effective 7/1/02.]
701.1.2 ABS and PVC DWV piping installations shall be
installed in accordance with ((IS 5 and IS 9)) applicable
standards in Table 14-1. Except for individual single family
dwelling units, materials exposed within ducts or plenums
shall have a flame-spread index of not more than 25 and a
smoke developed index of not more than 50, when tested in
accordance with the Test for Surface-Burning Characteristics
of the Building Materials (See the Building Code standards
based on ASTM E-84 and ANSI/UL 723).
704.3 Except where specifically required to be connected
indirectly to the drainage system, or when first approved by
the authority having jurisdiction, all plumbing fixtures,
drains, appurtenances, and appliances shall be directly
connected to the drainage system of the building or premises.
710.3 The minimum size of any pump or any discharge pipe from
a sump having a water closet connected thereto shall be not
less than two (2) inches (52 mm).
Sections 710.3.1 through 710.3.3 are not adopted.
CHAPTER 7, PART II -- BUILDING SEWERS
Part II Building Sewers. Delete all of Part II (Sections 713
through 723, and Tables 7-7 and 7-8).
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0700, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031, 19.27.074. 02-01-114, § 51-56-0700, filed 12/18/01, effective 7/1/02.]
903.1.2 ABS and PVC DWV piping installations shall be
installed in accordance with ((IS 5 and IS 9)) applicable
standards in Table 14-1. Except for individual single family
dwelling units, materials exposed within ducts or plenums
shall have a flame-spread index of not more than 25 and a
smoke developed index of not more than 50, when tested in
accordance with the Test for Surface-Burning Characteristics
of the Building Materials (see the Building Code standards
based on ASTM E-84 and ANSI/UL 723).
((908.4.1)) 908.2.1 Where Permitted. ((Any combination of
fixtures within one (1) or two (2) bathrooms located on the
same floor level and serving dwelling units or sleeping units
shall be permitted to be vented by a wet vent. The wet vent
shall be considered the vent for the fixtures and shall extend
from the connection of the dry vent along the direction of the
flow in the drain pipe to the most downstream fixture drain
connection to the horizontal branch drain. Only the fixtures
within the bathroom(s) shall connect to the wet-vented
horizontal branch drain. Any additional fixtures shall
discharge downstream of the wet vent system and be
conventionally vented.)) Water closets, bathtubs, showers,
bidets, and floor drains within one or two bathroom groups
located on the same floor level and for private use shall be
permitted to be vented by a wet vent. The wet vent shall be
considered the vent for the fixtures and shall extend from the
connection of the dry vent along the direction of the flow in
the drain pipe to the most downstream fixture drain or trap
arm connection to the horizontal branch drain. Each
wet-vented fixture drain or trap arm shall connect
independently to the wet-vented horizontal branch drain. Each
individual fixture drain or trap arm shall connect
horizontally to the wet-vented horizontal branch drain or
shall be provided with a dry vent. The trap to vent distance
shall be in accordance with Table 10-1. Only the fixtures
within the bathroom groups shall connect to the wet-vented
horizontal branch drain. The water closet fixture drain or
trap arm connection to the wet vent shall be downstream of any
fixture drain or trap arm connections. Any additional
fixtures shall discharge downstream of the wet-vent system and
be conventionally vented.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-0900, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031, 19.27.074. 02-01-114, § 51-56-0900, filed 12/18/01, effective 7/1/02.]
Part II Medical Gas and Vacuum Systems
1309.0 Scope.
1309.1 The provisions herein shall apply to the design,
installation, testing, and verification of medical gas,
medical vacuum systems, and related permanent equipment in
hospitals, clinics, and other heath care facilities.
1309.2 The purpose of this chapter is to provide minimum
requirements for the design, installation, testing and
verification of medical gas, medical vacuum systems, and
related permanent equipment, from the central supply system to
the station outlets or inlets.
1313.3 Minimum Station Outlets/Inlets. Station outlets and
inlets for medical gas and medical vacuum systems for
facilities licensed or certified by Washington state
department of health (DOH) or Washington state department of
social and health services (DSHS) shall be provided as listed
in chapter 246-320 WAC as required by the applicable licensing
rules as applied by DOH construction review services. All
other medical gas and medical vacuum systems shall be provided
as listed in Table 13-3.
1328.0 System Verification.
1328.1 Prior to any medical gas system being placed in
service, each and every system shall be verified as described
in section 1328.2.
1328.1.1 Verification tests shall be performed only after all
tests required in section 1327.0, Installer Performed Tests,
have been completed.
Testing shall be conducted by a party technically competent and experienced in the field of medical gas and vacuum pipeline testing and meeting the requirements of ANSI/ASSE Standard 6030, Medical Gas Verifiers Professional Qualifications Standard.
Testing shall be performed by a party other than the installing contractor or material vendor.
When systems have been installed by in-house personnel, testing shall be permitted by personnel of that organization who meet the requirements of this section.
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-1300, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-1300, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-1300, filed 12/18/01, effective 7/1/02.]
TABLE 14-1
Standards for Materials, Equipment, Joints and
Connections
Where more than one standard has been listed for the same
material or method, the relevant portions of all such
standards shall apply.
Add the following standard to those listed in Table 14-1:
| Standard Number | Standard Title | Application |
| (( |
||
| WAC 246-290-490 | Washington State Department of Health Cross-connection Control Requirements | Backflow Protection |
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-1400, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27.031 and 19.27.074. 04-01-110, § 51-56-1400, filed 12/17/03, effective 7/1/04; 02-01-114, § 51-56-1400, filed 12/18/01, effective 7/1/02.]
Part I, Gray Water Systems, is not adopted. Gray water shall
not be used for irrigation except as permitted by the
department of health rules.
Part II
1613. Nonpotable Reuse Water Systems -- General.
(A) The provisions of Part II of this chapter shall apply
to the installation, construction, alteration, and repair of
nonpotable reuse water intended to supply uses such as water
closets, urinals, and trap primers for floor drains, and floor
sinks, irrigation, industrial processes, water features and
other uses approved by the Authority Having Jurisdiction.
Potable water supplied as makeup water in these systems shall
be protected against back-pressure and backsiphonage in
accordance with Sections 602.0 and 603.0.
(B) No permit for any nonpotable reuse water system shall be issued until complete plumbing plans, with appropriate data satisfactory to the Authority Having Jurisdiction, have been submitted and approved. No changes or connections shall be made to either the nonpotable water system or the potable water system within any site containing a nonpotable reuse water system without approval by the Authority Having Jurisdiction.
(C) Before the building is occupied, the installer shall perform the initial cross-connection test in the presence of the Authority Having Jurisdiction and other authorities having jurisdiction. The test shall be ruled successful by the Authority Having Jurisdiction before final approval is granted.
(D) A nonpotable reuse water system shall be designed by a person registered or licensed to perform plumbing design work.
1614.0 Definitions. Nonpotable reuse water shall include the
following:
Reclaimed Water - Water derived in any part from
wastewater with a domestic wastewater component that has been
adequately and reliably treated, so that it can be used for
beneficial purposes. Reclaimed water is not considered a
wastewater (RCW 90.46.010);
Greywater or Gray Water - Domestic type flows from bathtubs, showers, bathroom sinks, washing machines, dishwashers, and kitchen or utility sinks. Gray water does not include flow from a toilet or urinal (RCW 90.46.010); and
Other nonpotable wastewater sources from appliances and fixtures excluding wastewater streams containing black water.
For rainwater harvesting, see Part III.
1615.0 Permit. It shall be unlawful for any person to
construct, install, alter, or cause to be constructed,
installed, or altered any nonpotable reused water system
within a building or on a premises without first obtaining a
permit to do such work from the Authority Having Jurisdiction.
1616.0 Drawings and Specifications. The Authority Having
Jurisdiction shall be permitted to require any or all of the
following information to be included with or in the plot plan
before a permit is issued for a nonpotable reused water
system.
(A) A plot plan drawn to scale and completely dimensioned, showing lot lines and structures, location of present and proposed potable water supplies and meters, water wells, streams, auxiliary water supply and systems, nonpotable reused water supply and meters, drain lines, and locations of private sewage disposal systems and 100 percent expansion areas or building sewer connected to the public sewer.
(B) Details of construction including riser diagrams or isometrics and a full description of the complete installation, including installation methods, construction, and materials as required by the Authority Having Jurisdiction. To the extent permitted by structural conditions, nonpotable reused water risers within the toilet room, including appurtenances such as air/vacuum relief valves, pressure reducing valves, etc., shall be installed in the opposite end of the room containing the served fixtures from the potable water risers or opposite walls, as applicable. To the extent permitted by structural conditions, nonpotable reused water headers and branches off risers shall not be run in the same wall or ceiling cavity of the toilet room where potable water piping is run.
(C) Detailed initial and annual testing requirements as outlined elsewhere in this chapter.
1617.0 Pipe Material/Pipe Identification. Nonpotable reused
water systems shall comply with Sections 1617.1 and 1617.2.
1617.1 Pipe Materials. Reclaimed water and nonpotable water
reuse pipe, valves and fittings shall conform to the
requirements of Sections 604.0, 605.0 and 606.0.
1617.2 Color and Information.
1617.2.1 Reclaimed Water. Reclaimed water systems shall have
a purple background with black uppercase lettering with the
words "CAUTION: RECLAIMED WATER, DO NOT DRINK." The minimum size of
the letters and length of the color field shall conform to
Table 6-1. Where used, a colored identification band shall be
indicated every twenty feet (6,096 mm) not less than once per
room, and shall be visible from the floor level. Marking is
not required for pipe manufactured with purple color integral
to the pipe and marked with black uppercase lettering to read
"CAUTION: NONPOTABLE RECLAIMED WATER, DO NOT DRINK" in intervals not to
exceed five feet (1,524 mm). All valves, except fixture
supply control valves shall be equipped with a locking
feature. All mechanical equipment that is appurtenant to the
reclaimed water system shall be painted purple.
1617.2.2 Other Nonpotable Reused Water. Except as noted in
Section 1617.2.1, nonpotable water systems shall have a yellow
background with black uppercase lettering, with the words
"CAUTION: NONPOTABLE WATER, DO NOT DRINK." Each nonpotable system
shall be identified to designate the liquid being conveyed,
and the direction of normal flow shall be clearly shown. The
minimum size of the letters and length of the color field
shall conform to Table 6-1.
The background color and required information shall be indicated every twenty feet but not less than once per room, and shall be visible from the floor level. Where concealed within construction, the piping shall be labeled on two opposing sides of the pipe within each stud or joist bay.
1618.0 Installation.
1618.1 Collection Reservoir. Nonpotable reuse water shall be
collected in an approved reservoir constructed of durable,
nonabsorbent and corrosion-resistant materials. The reservoir
shall be a closed and gas-tight vessel. Access openings shall
be provided to allow inspection and cleaning of the reservoir
interior. The reservoir shall be sized to limit the retention
time of nonpotable reuse water to a maximum of seventy-two
hours.
1618.1.1 Filtration. Nonpotable reuse water entering the
reservoir shall pass through an approved filter such as a
media, sand or diatomaceous earth filter.
1618.1.2 Required Valve. A full-open valve shall be installed
downstream of the last fixture connection to the nonpotable
reuse water discharge pipe before entering the required
filter.
1618.1.3 Overflow. The collection reservoir shall be equipped
with an overflow pipe of the same diameter as, or larger than,
the influent pipe for the nonpotable reuse water. The
overflow shall be indirectly connected to the sanitary
drainage system.
1618.1.4 Drain. A drain shall be located at the lowest point
of the collection reservoir and shall be indirectly connected
to the sanitary drainage system. The drain shall be the same
diameter as the overflow pipe required in Section 1618.1.3.
1618.1.5 Disinfection. Nonpotable reuse water shall be
disinfected by an approved method that uses one or more
disinfectants such as chlorine, iodine or ozone.
1618.1.6 Makeup Water. Potable water shall be supplied as a
source of makeup water for nonpotable water systems that serve
plumbing fixtures. The potable supply shall be protected
against backflow in accordance with Chapter 6. A full-open
valve shall be located on the makeup water supply line to the
collection reservoir.
(A) Hose bibbs shall not be allowed on nonpotable reuse water piping systems.
(B) The nonpotable reuse water system and the potable water system within the building shall be provided with the required appurtenances (valves, air/vacuum relief valves, etc.,) to allow for deactivation or drainage as required by this chapter for a cross-connection test in Section 1620.0.
(C) Nonpotable reuse water pipes shall not be run or laid in the same trench as potable water pipes. A ten foot (3,048 mm) horizontal separation shall be maintained between pressurized, buried reclaimed and potable water piping. Buried potable water pipes crossing pressurized nonpotable reuse water pipes shall be laid not less than twelve inches (305 mm) above the nonpotable reuse water pipes. Nonpotable reuse water pipes laid in the same trench or crossing building sewer or drainage piping shall be installed in compliance with Sections 609.0 and 720.0 of this code. Nonpotable reuse water pipes shall be protected similar to potable water pipes.
1619.0 Signs.
1619.1 Commercial, Industrial and Institutional Room Entrance
Signs. In commercial, industrial, and institutional
occupancies, all rooms using nonpotable reuse water for water
closets and/or urinals shall be identified with signs. Each
sign shall contain one-half inch (12.7 mm) letters of a highly
visible color on a contrasting background. The location of
the sign(s) shall be such that the sign(s) shall be visible to
all users. The number and location of the signs shall be
approved by the Authority Having Jurisdiction and shall
contain the following text:
| TO CONSERVE WATER, THIS BUILDING USES RECLAIMED WATER TO FLUSH TOILETS AND URINALS. |
| CAUTION NONPOTABLE RECLAIMED WATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING WATER SYSTEM. NOTICE CONTACT BUILDING MANAGEMENT BEFORE PERFORMING ANY WORK ON THIS WATER SYSTEM. |
1619.3 Where water closets and/or urinals are flushed with
nonpotable reuse water, the fixture shall be labeled:
| CAUTION TO CONSERVE WATER, THIS BUILDING USES NONPOTABLE RECLAIMED WATER TO FLUSH TOILETS AND URINALS |
1620.0 Inspection and Testing.
1620.1 Nonpotable reuse water piping shall be inspected and
tested as outlined in this code for testing of potable water
piping.
1620.2 An initial and subsequent annual inspection and test
shall be performed on both the potable and nonpotable reuse
water systems. The potable and nonpotable reuse water systems
shall be isolated from each other and independently inspected
and tested to ensure there is no cross-connection as follows:
1620.2.1 Visual Dual System Inspection. Prior to commencing
the cross-connection testing, a dual system inspection shall
be conducted by the Authority Having Jurisdiction and other
authorities having jurisdiction.
(i) Meter locations of the nonpotable reuse water and potable water lines shall be checked to verify that no modifications were made, and that no cross-connections are visible.
(ii) Pumps and equipment, equipment room signs, and exposed piping in the equipment room shall be checked.
(iii) Valves shall be checked to ensure that valve lock seals are still in place and intact. Valve control door signs shall be checked to verify that no signs have been removed.
1620.2.2 Cross-Connection Test. The following procedure shall
be followed by the applicant in the presence of the Authority
Having Jurisdiction and other authorities having jurisdiction
to determine whether a cross connection occurred.
(i) The potable water system shall be activated and pressurized. The nonpotable reuse water system shall be shut down and completely drained.
(ii) The potable water system shall remain pressurized for a minimum period of time specified by the Authority Having Jurisdiction while the nonpotable reuse water system is empty. The minimum period the nonpotable reuse water system is to remain depressurized shall be determined on a case-by-case basis, taking into account the size and complexity of the potable and nonpotable reuse water distribution systems, but in no case shall that period be less than one hour.
(iii) Fixtures, potable and reclaimed, shall be tested and inspected for flow. Flow from any nonpotable reuse water system outlet shall indicate a cross-connection. No flow from a potable water outlet would indicate that it is connected to the nonpotable reuse water system.
(iv) The drain on the nonpotable reuse water system shall be checked for flow during the test and at the end of the period.
(v) The potable water system shall then be completely drained.
(vi) The nonpotable reuse water system shall then be activated and pressurized.
(vii) The nonpotable reuse water system shall remain pressurized for a minimum period of time specified by the Authority Having Jurisdiction while the potable water system is empty. The minimum period the potable water system is to remain depressurized shall be determined on a case-by-case basis, but in no case shall that period be less than one hour.
(viii) Fixtures, potable and reclaimed, shall be tested and inspected for flow. Flow from any potable water system outlet shall indicate a cross-connection. No flow from a nonpotable reuse water outlet would indicate that it is connected to the potable water system.
(ix) The drain on the potable water system shall be checked for flow during the test and at the end of the period.
(x) If there is no flow detected in any of the fixtures that would have indicated a cross-connection, the potable water system shall be repressurized.
1620.2.3 Cross-Connection Discovered. The following
procedure, in the presence of the Authority Having
Jurisdiction, shall be activated immediately:
(i) Nonpotable reuse water piping to the building shall be shut down at the meter, and the nonpotable reuse water riser shall be drained.
(ii) Potable water piping to the building shall be shut down at the meter.
(iii) The cross-connection shall be uncovered and disconnected.
(iv) The building shall be retested following procedures listed in subsections (B)(1) and (2) above.
(v) The potable water system shall be chlorinated with fifty ppm chlorine for twenty-four hours.
(vi) The potable water system shall be flushed after twenty-four hours, and a standard bacteriological test shall be performed. If test results are acceptable, the potable water system shall be permitted to be recharged.
1620.3 An annual inspection of the nonpotable reuse water
system, following the procedures listed in subsection 1620.0
(B)(1), shall be required. Annual cross-connection testing,
following the procedures listed in subsection 1620.0 (B)(2),
shall be required by the Authority Having Jurisdiction, unless
site conditions do not require it. In no event shall the test
occur less often than once in four years. Alternate testing
requirements shall be permitted by the Authority Having
Jurisdiction.
1621.0 Sizing. Nonpotable reuse water piping shall be sized
as outlined in this code for sizing potable water piping.
1622.0 Abandonment of Nonpotable Reuse Water Systems. Where
nonpotable reuse water systems are abandoned, the procedure
for abandonment shall be as required by the Authority Having
Jurisdiction. Components of the abandoned system, including,
but not limited to, pipe, tubing, fittings and valves shall
not be used for potable water systems.
Part III
1623.0 Rainwater Harvesting Systems - General. All components
of the system not specifically addressed by the provisions of
Part III of this chapter shall meet all applicable sections of
this code, and any applicable manufacturer's installation
instructions.
Engineered systems shall be installed per plans and specifications of the engineer of record.
1624.0 Scope. Applications for rainwater harvesting are
unique for each application. For this reason, each rainwater
harvesting system proposed for use must be engineered and
site-specific and are subject to the approval of the Authority
Having Jurisdiction. The requirement for the system to be
engineered may be waived by the Authority Having Jurisdiction.
1624.1 Water Uses. Harvested rainwater uses may include water
closets, urinals, hose bibbs, industrial applications, and
irrigation purposes. Other uses may be allowed when first
approved by the Authority Having Jurisdiction.
1625.0 Definitions. In addition to other definitions used in
the Uniform Plumbing Code, the following definitions apply to
rainwater harvesting systems.
1625.1 Auxiliary Supply. The piping arranged and protected
from contamination to provide an alternate means of filling a
cistern.
1625.2 Cistern. The central storage component of the
rainwater harvesting system. Protection and maintenance of
the cistern is essential for the health of the system.
1625.3 Debris Excluder. A screen or other device installed on
the gutter or downspout system to prevent the accumulation of
leaves, needles, or other debris in the system.
1625.4 Flat. Having a slope no greater than 1 in 50.
1625.5 Piping System. The system of pipes that conveys the
harvested rainwater and distributes it to various fixtures.
1625.6 Prefiltration. A device to mechanically remove
sediment and debris.
1625.7 Pump or Pressure System. The mechanical device
necessary to distribute the harvested rainwater from the
cistern to the designated fixtures.
1625.8 Rainwater Harvesting System (RWS). A cistern(s), pipe,
fittings, pumps and other plumbing appurtenances required for
and/or used to harvest and distribute rainwater.
1625.9 Return Elbow. A section of pipe with a 180-degree
bend.
1625.10 Roof Drainage System. The roof drains, overflow
drains, scuppers, gutters and downspouts used to convey the
rainwater from the roof surface to the system.
1625.11 Roof Surface. The surface rainwater harvesting
systems rely on for the collection of rainwater that has
fallen on a building roof.
1625.12 Roof Wash or Roof Washer. A device or method for
removal of sediment and debris from collected roof water by
diverting initial rainfall from entry into the cistern(s).
1625.13 Screen. Corrosion resistant wire or other approved
mesh having openings in determined sizes.
1625.14 Slope or Sloping. Having a slope greater than 1 in
50.
1625.15 Transfer Pump. The mechanical device to transfer
collected water from downspouts to remote cistern(s).
1626.0 Permit. It shall be unlawful for any person to
construct, install, alter, or cause to be constructed,
installed, or altered any rainwater harvesting system within a
building or on a premises without first obtaining a permit to
do such work from the Authority Having Jurisdiction.
In addition to the permits required by this Code, the following additional permits may be required for the installation of a rainwater harvesting system: An electrical permit for the pump or other electrical controls; a building permit for cistern footings, foundations, enclosures and roof structures; a grading permit may be necessary for underground tanks. In addition, contact your regional office of the department of ecology regarding a registration form.
1626.1 Application. The following information must be
provided with each permit application for a rainwater
harvesting system:
1. Site or plot plan, including site elevations.
2. A diagram of the rainwater harvesting system (including piping and equipment) and domestic potable water systems, including sizing and dimensions.
3. Specifications and manufacturer's installation instructions for cistern(s), pump(s), filtration and/or disinfection, and roof washing or pre-filtration system(s).
4. Engineering. Installation, including, but not limited to, the following systems, will require structural engineering: Cisterns that are located on top of a building structure or cisterns that are located on sloping sites.
Information in addition to that listed above may be necessary in some instances. The size and complexity of the building, site and system will determine the necessity for additional information.
1627.0 General Provisions. A rainwater harvesting system
begins at the point of collection and terminates as waste
after the water collected has been used in plumbing fixtures,
industrial applications, or used for irrigation purposes. The
parts of the collection and distribution system include the
roof surface, gutters and downspouts, roof washer, cistern,
pump and the piping system.
1627.1 Collection System. Rainwater shall only be harvested
from roof surfaces. Harvest shall not occur from the
following locations:
1. Any vehicular or pedestrian area;
2. Surface water runoff; or
3. Bodies of standing water.
1627.2 Collection Pretreatment. Rainwater harvested from roof
surfaces shall be pretreated by either a roof washing system
or other filtration system of no more than 50 microns. The
quantity of the first flush generated by the rainwater
harvesting system during any rain event shall be calculated as
the first 0.02 inch of rainfall per 24-hour period per square
foot of roof area and shall be diverted away from the cistern.
Discharge of any diverted water shall go to a location
approved by the Administrative Authority.
| EXCEPTIONS: | 1. A first flush is not required where a post storage filtration or treatment system is installed and approved by the Administrative Authority. |
| 2. A first flush is not required for systems used exclusively for irrigation purposes. |
1628.1 Roof Surface. The roof surface may be constructed of
any material accepted by the Administrative Authority.
| EXCEPTION: | Copper, zinc or lead roofing materials shall not be used. |
1. Gutters and downspouts may be manufactured of any material. Gutter and downspout materials are not required to meet material specifications found in the Uniform Plumbing Code.
| EXCEPTION: | Copper or zinc gutters and downspouts shall not be used. If existing gutters and downspouts are already in place, the interior shall be coated with a NSF-quality epoxy paint. |
1628.3 Roof Washers and Prefiltration. All rainwater
harvesting systems using impervious roof surfaces shall have
at least one roof washer per downspout or prefiltration
system. A roof washer or prefiltration system is not required
for pervious roof surfaces such as green roofs. Roof washers
and prefiltration systems shall meet the following design
requirements.
1628.3.1 All collected rainwater shall pass through a roof
washer or prefiltration system before the water enters the
cistern(s).
1628.3.2 If more than one cistern is used, a roof washer or
prefiltration system shall be provided for each cistern.
| EXCEPTION: | Where a series of cisterns are interconnected to supply water to a single system. |
1628.3.3.1 The inlet to the roof washer shall be provided with
a debris screen that protects the roof washer from the
intrusion of waste and vermin.
1628.3.3.2 The roof washer shall rely on manually operated
valves or other devices to do the diversion.
1628.3.3.8 Roof washers shall be readily accessible for
regular maintenance.
1628.3.4 Prefiltration screens or filters shall be maintained
consistent with manufacturer's specifications.
1628.4 Cisterns. The following are the minimum requirements
for cisterns.
1628.4.1 General.
1628.4.1.1 All cisterns shall be listed for use with potable
water.
1628.4.1.2 Cisterns shall be capable of being filled from both
the rainwater harvesting system and the public or private
water system.
1628.4.1.3 The municipal or on-site well water system shall be
protected from cross-contamination in accordance with Section
603.4.5.
1628.4.1.4 Backflow assemblies shall be maintained and tested
in accordance with Section 603.3.3.
1628.4.1.5 Cisterns may be used as storm water collection
points that help to minimize flood damage, while providing a
reservoir for later use.
1628.4.1.6 Cisterns shall have access to allow inspection and
cleaning.
1628.4.2 Size. Any cistern, or combination of cisterns used,
shall be sized adequately for the intended use of the water.
1628.4.2.1 For above grade cisterns, the ratio of the cistern
size shall not be greater than 1:1 height to width, provided
that for an engineered tank with an engineered foundation, the
height may exceed the width, subject to approval of the
Authority Having Jurisdiction. The ratio for below grade
cisterns is not limited.
1628.4.3 Location. Cisterns may be installed either above or
below grade. All cisterns shall be installed in accordance
with the manufacturer's installation instructions. Where the
installation requires a foundation, the foundation shall be
flat and shall be capable of supporting the cistern weight
when the cistern is full.
1628.4.3.1 Below Grade Cisterns. Below grade cisterns shall
be provided with manhole risers a minimum of 8 inches above
surrounding grade. Underground cisterns shall have tiedowns
per manufacturer's specifications, or the excavated site must
have a daylight drain or some other drainage mechanism to
prevent floating of the cistern resulting from elevated ground
water levels.
1628.4.4 Protection. Cisterns shall be protected from
sunlight to inhibit algae growth and ensure life expectancy of
tank.
1628.4.5 Inlets, Outlets and Openings. All cistern openings
shall be protected from unintentional entry by humans or
vermin. Manhole covers shall be provided and shall be secured
to prevent tampering. Where an opening is provided that could
allow the entry of personnel, the opening shall be marked,
"DANGER - CONFINED SPACE."
Cistern outlets shall be located at least 4 inches above the bottom of the cistern.
1628.4.6 Overflow. The cistern shall be equipped with an
overflow device.
1628.4.6.1 The overflow device shall consist of a pipe equal
to or greater than the cistern inlet and a minimum of 4 inches
below any makeup device from other sources.
1628.4.6.2 The overflow outlet shall be protected with a
screen having openings no greater than 0.25 inches or a
self-sealing cover.
1628.4.6.3 The Authority Having Jurisdiction shall approve the
discharge location of the overflow water.
1628.5 Pump. Where a pump is provided in conjunction with the
rainwater harvesting system, the pump shall meet the following
provisions.
1628.5.1 The pump and all other pump components shall be
listed and approved for use with potable water systems.
1628.5.2 The pump shall be capable of delivering a minimum of
15 psi residual pressure at the highest outlet served.
Minimum pump pressure shall allow for friction and other
pressure losses. Maximum pressures shall not exceed 80 psi.
1628.6 Piping.
1628.6.1 There shall be no direct connection of any rainwater
harvesting pipe system and any domestic potable water pipe
system.
1628.6.2 Materials. Pipe used to convey harvested rainwater
shall be identified per Section 601.2 and Table 6-1. Fittings
and other system components shall be listed for use in
conjunction with specified piping. Both piping and fittings
shall be installed as required by applicable code and
standards.
1628.6.2.1 All other products entering into the construction
of a rainwater harvesting system shall be listed as required
by code for the purpose intended, and suitable for use in a
potable water system.
1628.6.3 Color and Information. All rainwater pipe shall be
marked "CAUTION: NONPOTABLE RAINWATER, DO NOT DRINK" every four feet
along its length, but in no case less than once per room. The
pipe and lettering shall comply with Section 601.2. Where
concealed within construction, the piping shall be labeled on
two opposing sides of the pipe within each stud or joist bay.
1629.0 Signs.
1629.1 Commercial, Industrial and Institutional Room Entrance
Signs. In commercial, industrial, and institutional
occupancies, all rooms using nonpotable reuse water for water
closets and/or urinals shall be identified with signs. Each
sign shall contain one-half inch (12.7 mm) letters of a highly
visible color on a contrasting background. The location of
the sign(s) shall be such that the sign(s) shall be visible to
all users. The number and location of the signs shall be
approved by the Authority Having Jurisdiction and shall
contain the following text:
| TO CONSERVE WATER, THIS BUILDING USES RAINWATER TO FLUSH TOILETS AND URINALS. |
| CAUTION NONPOTABLE RAINWATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING WATER SYSTEM. NOTICE CONTACT BUILDING MANAGEMENT BEFORE PERFORMING ANY WORK ON THIS WATER SYSTEM. |
1629.3 Every water closet or urinal supply, hose bibb or
irrigation outlet shall be permanently identified with an
indelibly marked placard stating:
| CAUTION NONPOTABLE RAINWATER, DO NOT DRINK |
(A) Rainwater harvesting systems shall be inspected and tested as outlined in this code for testing of potable water piping.
(B) An initial inspection and test shall be performed on both the potable and rainwater harvesting systems. The potable and rainwater system shall be isolated from each other and independently inspected and tested to ensure there is no cross-connection.
1631.0 System Maintenance. Rainwater harvesting systems shall
be maintained in functioning order for the life of the system.
It is the property owner's responsibility to maintain the
system until the system is abandoned as prescribed in this
code.
1632.0 System Abandonment. If the owner of a rainwater
harvesting system elects to cease use of, or fails to properly
maintain such system, they shall abandon the system. To
abandon the system one shall:
1. Remove the system entirely; and
2. Replace the rainwater harvesting pipe system with an approved potable water supply pipe system. Where an existing potable pipe system is already in place, fixtures may be reconnected to the existing system.
Rainwater harvesting system abandonment and potable water installations require permit, inspection(s) and approval(s).
[Statutory Authority: RCW 19.27.190, 19.27.020 and chapters 19.27 and 34.05 RCW. 07-01-094, § 51-56-1600, filed 12/19/06, effective 7/1/07.]