DSCV100 by Dixon Valve | Domestic Swing Check Valve | 1" Female NPT x 1" Female NPT | BrassFeatures: Class 150 ASME B1. 20. 1 100% factory tested. Female threaded ends. Materials: Metal seat Specifications: Working Pressure: 300 PSI cold, 150 PSI Steam. Temperature range: 20F to 406F ( 29C to 208C). Part Number Female NPT x Female NPT DSCV50 1 2" x 1 2" DSCV75 3 4" x 3 4" DSCV100 1" x 1" DSCV125 1 1 4" x 1 1 4" DSCV150 1 1 2" x 1 1 2" DSCV200 2" x 2"