Section 246-335-245. Plumbing.

An applicant must design and install plumbing, including:

(1) Backflow prevention with 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 without aerators on handwash sinks;

(4) Insulation on:

(a) Hot water piping systems;

(b) Cold water and drainage piping; and

(c) Piping exposed to outside temperatures; and

(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 sanitization;

(d) 120°F or more for mechanical dishwashers using chemical sanitization;

(e) 140°F or more for mechanical dishwashers using high temperature sanitization; and

(f) 180°F or more for sanitization cycle in high temperature mechanical dishwashers.

[Statutory Authority: Chapter 70.127 RCW. WSR 02-18-026, § 246-335-245, filed 8/23/02, effective 10/1/02.]

Chapter 70.127 RCW. WSR 02-18-026, § 246-335-245, filed 8/23/02, effective 10/1/02.