Hayward TBH1100ASTV1000 1" TBH Series PVC Ball Valve with SOC Ends - The TBH Series features a low maintenance design with its new patent pending System2™ Sealing Technology for sizes up to 2"/DN50. Sizes 2-1/2" through 6" have energized PTFE seats with backing O-ring as standard. All seats are reversible to allow easy field rebuild. Assisting users in protecting property and life, a standard integral lock-out feature secures onto the body of the valve.