General The F-998 Swing Check Valve is rated 300psi CWP, with Epoxy Coated Body and is UL Listed and FM Approved. Check valves prevent backflow by automatically closing when fluid reverses direction. Overview 300 PSI Rating UL Listed, FM Approved Size Range 2”- 12” Flange by Flange Ductile iron body Bronze Body Seat EPDM Seat Disc Seal AWWA C550 Epoxy Coated Bubble Tight Shut Off Serviceable UL/ULC Listed UL Listed for Indoor and Outdoor Service FM Approved