Unless a different meaning is clearly required by the context, the following terms and definitions are important:

"Advisory board" is the state advisory board of plumbers.

"Assist" means a friend, neighbor, or other person (including a certified plumber) may assist a householder, at his or her residence, in the performance of plumbing work on the condition that the householder is present when the work is performed and the person assisting the householder does not accept money or other forms of compensation for the volunteer work. For the purposes of this subsection, a residence is a single-family residence.

"Audit" means an assessment, evaluation, examination or investigation of, contractor's accounts, books and records for the purpose of verifying the contractor's compliance with RCW 18.106.320.

"Backflow assembly" or "backflow prevention assembly" or "backflow preventer" is a device as described in the Uniform Plumbing Code used to prevent the undesired reversal of flow of water or other substances through a cross-connection into the public water system or consumer's potable water system.

"Backflow assembly tester" is an individual certified by the department of health to perform tests to backflow assemblies.

"Calendar day" means each day of the week, including weekends and holidays.

"Continuing education" is approved plumbing and electrical courses for journey level, domestic pump specialty plumbers, and residential specialty plumbers, to meet the requirements to maintain their plumbing certification and for trainees or individuals to become certified plumbers in Washington.

"Continuing education course provider" is an entity approved by the department, in consultation with the state advisory board of plumbers, to provide continuing education training for journey level, domestic pump specialty plumbers, residential specialty plumbers, and trainees. All training course providers must comply with the requirements in WAC 296-400A-028.

"Continuity affidavit" is a form developed by the department that is used to verify whether medical gas pipe installation work (brazing process) has been performed biannually. This form is provided to the department at the time of renewal by the person holding the medical gas piping installer endorsement and requires the notarized signature of the employer of the medical gas piping installer or another qualified verifier as determined by the department. Continuity is a visual examination by the employer of the brazing that was performed. The medical gas installer must also review the current medical gas code and sign the affidavit stating that they have done so.

"Contractor" means any person, corporate or otherwise, who engages in, or offers or advertises to engage in, any work covered by the provisions of chapter 18.106 RCW by way of trade or business, or any person, corporate or otherwise, who employs anyone, or offers or advertises to employ anyone, to engage in any work covered by the provisions of chapter 18.106 RCW and is registered as a contractor under chapter 18.27 RCW.

"Control" means that the journey level plumber, specialty plumber, or temporary permit plumber is physically on-site at the start of each day and each and every job site to diagnose, direct, and lay out the plumbing work the trainee is to perform.

"Course of study" means classroom training and practical work experience in the plumbing industry as defined in WAC 296-400A-100.

"Department" is the department of labor and industries.

"Director" is the director of the department of labor and industries or designee.

"Dispatcher" means the contractor's employee who authorized the work assignment of the person employed in violation of chapter 18.106 RCW.

"Journey level plumber" is anyone who has learned the commercial plumbing trade and has been issued a journey level certificate of competency by the department. A journey level plumber may work on plumbing projects including residential, commercial and industrial worksite locations.

"Medical gas piping installer" is anyone who has been issued a medical gas piping installer endorsement of competency by the department.

"Medical gas piping systems" are piping systems that convey or involve oxygen, nitrous oxide, high pressure nitrogen, medical compressed air, and other medical gas or equipment including, but not limited to, medical vacuum systems.

"Multiunit" is a multi-single family residence contained in a building or group of buildings that do not exceed three stories on any portion of the building.

"Plumbing" is that craft involved in installing, altering, repairing and renovating potable water systems, liquid waste systems and medical gas piping systems in the footprint of a building. Potable water systems, liquid waste systems, and medical gas piping systems are defined by the current Uniform Plumbing Code (UPC) and amendments adopted by the state building code council. All piping, fixtures, pumps and plumbing appurtenances that are used for rain water catchment and a reclaimed water system are included in the definition of liquid waste systems.

"Records" include, but are not limited to, all bids, invoices, billing receipts, time cards and payroll records that show the work was performed, advertised, or bid.

"Residential service" is limited to performing residential service in single-family dwellings and duplexes and can only repair or replace previously existing fixtures, piping, and fittings that are outside the interior wall or above the floor.

"Specialty plumber" is anyone who has been issued a specialty plumbers certificate of competency by the department limited to:

(a) Installation, maintenance and repair of plumbing for single-family dwellings, duplexes and apartment buildings which do not exceed three stories;

(b) Maintenance and repair of backflow assemblies located within a residential or commercial building or structure. For the purposes of this subsection, "maintenance and repair" includes cleaning and replacing internal parts of an assembly, but does not include installing or replacing backflow assemblies.

(c) "Domestic pump specialty" means the installation, maintenance, and repair of a domestic water pumping system consisting of the pressurization, treatment, and filtration components of a domestic water system consisting of: One or more pumps; pressure, storage, and other tanks; filtration and treatment equipment; if appropriate, a pitless adapter; along with valves, transducers, and other plumbing components that:

(i) Are used to acquire, treat, store, or move water suitable for either drinking or other domestic purposes, including irrigation, to:

(A) A single-family dwelling, duplex, or other similar place of residence;

(B) A public water system, as defined in RCW 70.119.020 and as limited under RCW 70.119.040; or

(C) A farm owned and operated by a person whose primary residence is located within thirty miles of any part of the farm;

(ii) Are located within the interior space including, but not limited to, an attic, basement, crawl space, or garage, of a residential structure, which space is separated from the living area of the residence by a lockable entrance and fixed walls, ceiling, or floor;

(iii) If located within the interior space of a residential structure, are connected to a plumbing distribution system supplied and installed into the interior space by either:

(A) A person who, pursuant to RCW 18.106.070 or 18.106.090, possesses a valid temporary permit or certificate of competency as a journey level plumber, specialty plumber, or trainee, as defined in this chapter; or

(B) A person exempt from the requirement to obtain a certified plumber to do such plumbing work under RCW 18.106.150.

For the purposes of the domestic pump specialty, residential structure includes any improvement to real property where that property is primarily used as a residence.

"Story" is defined by the current building codes and amendments adopted by the state building code council which includes basements or garages.

"Supervision" for the purpose of these rules means within sight and sound. Supervision requirements are met when the supervising plumber is on the premises and within sight and sound of the individual who is being trained. "Exception" for remote service trainee supervision available via mobile phone or a similar device on residential structure and meeting all other requirements under RCW 18.106.070 and the requirements for service plumbing under RCW 18.106.010.

"Trainee plumber" is anyone who has been issued a trainee certificate and is learning or being trained in the plumbing trade with direct supervision of either a journey level plumber or specialty plumber working in their specialty.

"Training course provider" is an entity approved by the department, in consultation with the state advisory board of plumbers, to provide medical gas piping installer training. All training course providers must comply with the requirements in WAC 296-400A-026.

PDFWAC 296-400A-005

What definitions do I need to know to understand these rules?