The Series TBV True Union Ball Valves are an economical, PVC constructed ball valve ideal for chemical and wastewater applications. The true union design allows for easy removal from a piping system without breaking down piping connections. The valve body can be lifted out of the line by unscrewing two assembly nuts. Series TBV ball valves feature a double oring stem seal for twice the leakage protection of valves with only a single stem seal. All plastic construction gives this series of ball valves superior corrosion resistance. Full port design provides maximum Cv with minimal pressure drop.