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.Wash. Admin. Code § 246-215-05310
Amended by WSR 21-01-122, Filed 12/15/2020, effective 1/15/2021Statutory Authority: RCW 43.20.050 and 43.20.145. 13-03-109, § 246-215-05310, filed 1/17/13, effective 5/1/13.