Most recent
IAPMO IGC 91-2019
Electrical or high-density magnetic anti-scale or water conditioning
This standard covers electrical anti-scale or water conditioning appliances in nominalpipe sizes from 1/2 in. (12.7 mm) through 3 in. (76.2 mm) and configurations include slipfittings, male nominal pipe threads (MNPT) for plastic and metal fittings and fe
International Association of Plumbing and Mechanical Officials [iapmo]