TB1050STE Hayward 1/2 in TB Series True Union PVC Ball Valve Valve Socket/Threaded EPDM TB Series true union ball valves are offered in PVC, CPVC and Platinum GFPP. O-rings are FPM or EPDM and seats are PTFE. Up to 2 in. sizes have socket and threaded end connections. A trigger style lockout handle is an option. All valves are assembled with silicone free lubricant.NSF/ANSI 61 ListedPVC, CPVC and GFPPFull Port DesignReversible PTFE SeatsDouble O-Ring Stem SealsEasy to ServiceEasily Automated