CV100MT by Banjo | Mini Check Valve | 1" Male NPT x 1" Female NPT | 1-2 PSI 316 Stainless Steel Springs | 300 PSI | Gasket: EPDM | Polypropylene | Pack of 10Description: 316 stainless steel springs. Glass reinforced polypropylene. One piece construction. EPDM gasket. Part Number Description Cracking Pressure PSI Max PSI Pipe Size CV050 1 2" Check Valve 6 7 PSI 300 PSI 1 2" CV100 1" Check Valve 1 PSI 300 PSI 1" CV100MT 1" Male X Female NPT Check Valve 1 PSI 300 PSI 1" CV100V 1" Female X Female NPT Check 1 PSI 300 PSI 1" CV221 2" Full Port Check Valve >0. 5 PSI 300 PSI 2" CV300 3" Full Port Check Valve 1. 5