Wis. Admin. Code § PSC 135.125
After 49 CFR 192.125(d), insert:
(ew) Fittings in copper piping. Fittings in copper piping and exposed to the soil, such as service tees and pressure control fittings, shall be made of bronze, copper or brass.
History: Cr. Register, October, 1999, No. 526, eff. 11-1-99.