All inner surfaces of the Tru-Bloc bleach valve are kept constantly wetted and vented to the upstream side when the valve is in the closed position, eliminating the conditions required for gas accumulation and caustic crystallization in the body cavity. The Tru-Bloc valve is engineered with a self-adjusting seat and upstream and downstream blocking capability to stop flow when an alternate union is removed for servicing the piping system. The valve can be easily joined with the socket end connections. Please refer to Chemtrol technical data sheets, valve selection guides and catalogs for engin