Simmons 500 SB Series 503SB Check Valve, 1 in, FPT, 400 psi Pressure, Silicone Bronze Body

Silicon bronze cast body and poppet contain less than 0.05% Lead. Furnished with Buna 'N o-ring, stainless steel spring, washer and locknut. All valves В«" through 1-1/2" have a working pressure of 400 PSI. All valves 2" and larger have a working pressure of 600 PSI.