If a water tank is designed with an access port for inspection and cleaning, the opening must be in the top of the tank and:
(1) Flanged upward at least one-half inch (13 mm); and
(2) Equipped with a port cover assembly that is:
(a) Provided with a gasket and a device for securing the cover in place; and
(b) Flanged to overlap the opening and sloped to drain.
[Statutory Authority: RCW
43.20.050 and
43.20.145. WSR 21-01-122, § 246-215-05310, filed 12/15/20, effective 3/1/22; WSR 13-03-109, § 246-215-05310, filed 1/17/13, effective 5/1/13.]