Section 246-335-748 - Plumbing An applicant must design and install plumbing, including:
(1) Backflow prevention. Devices on plumbing fixtures, equipment, facilities, buildings, premises, or areas which may cause actual or potential cross-connections of systems in order to prevent the backflow of water or other liquids, gases, mixtures, or substances into a water distribution system or other fixtures, equipment, facilities, buildings, or areas;(2) Trap primers in floor drains and stand pipes subject to infrequent use;(3) Wrist, knee or foot faucet controls or equivalent and gooseneck spouts on handwash sinks;(4) Insulation on: (a) Hot water piping systems;(b) Cold water and drainage piping; and(c) Piping exposed to outside temperatures.(5) Equipment to deliver hot water at point of use as follows: (a) 120°F or less for handwash sinks and bathing fixtures;(b) 160°F or more for laundry washers;(c) 120°F or more for laundry washers using chemical sanitation.Wash. Admin. Code § 246-335-748
Adopted by WSR 18-06-093, Filed 3/6/2018, effective 4/6/2018