UL / FM Alarm Check Valve, Vertical Trim (Flange x Flange)
UL / FM Alarm Check Valves. 300 psi rating. (FM Approved through 6″ size). High Strength Ductile-Iron Body. Stainless Steel Stem and Ring. The UL / FM Alarm Check Valve, Vertical Trim (Flange x Flange) is Fusion Bonded Epoxy Coated Interior and Exterior to AWWA C550 Standard. Flanged ends to ANSI B16.1, Class 125, ASME B16.42, Class 150.