4" Brass Check Valves
4" Grooved Check Valve prevents backflow from water-based systems, including fire sprinkler and standpipe systems, with a spring-operated mechanism that closes the valve at low flows.
UL-listed, FM Approved and made from heavy-duty brass
Click here for Shotgun Riser Check Valves
Click here for Grooved Check Valves (Ductile)
Click here for Flanged Check Valves