1209.5.1 Slab-on-grade installation. Radiant piping utilized in slab-on-grade applications shall be provided with insulating materials installed beneath the piping as required by the Washington State Energy Code.
1210.7.6 Expansion tanks. Shutoff valves shall be installed at connections to expansion tanks. A method of draining the expansion tank downstream of the shutoff valve shall be provided.
[Statutory Authority: RCW
19.27.031 and
19.27.074. WSR 16-01-148, § 51-52-1200, filed 12/21/15, effective 7/1/16.]