This is a top-quality water heater relief valve made by APCOM. It has a brass material and can handle up to 150 PSI. The shank size is 2-1/2 inches and the MNPT measures 3/4 inches. This valve is compatible with Sears, Maytag, Whirlpool, Kenmore, A. O. Smith, and GSW brands, and has a model number of APCOM 100108601. It is also compatible with model number 9001583045. Purchase this product for your water heating needs today!