The Series TBV2 Industrial True Union Ball Valves are an economical, PVC or CPVC constructed ball valve ideal for chemical and wastewater applications. The true union design permits easy removal from a piping system without breaking down piping connections. The valve body can be easily lifted out of the line by unscrewing two assembly nuts. A special threaded seal retainer allows for the seat to be adjusted while maintaining downstream system pressure. Series TBV2 ball valves feature a double o-ring stem seal for twice the leakage protection of valves with only a single stem seal. All plastic construction gives this line of valves superior corrosion resistance. Full port design provides maximum Cv with minimal pressure drop.