Colonial Vented Full Block True Union Ball Valve for Sodium Hypochlorite Size:1" Standard 20 Foot Length 4TDGWT 11 Standard 20 Foot Length these bags make waste management seamless and reliable Colonial Vented Full Block True Union Ball Valve for Sodium Hypochlorite provide a solution in applications where Sodium Hypochlorite (Bleach) and other chemical process applications may cause plating and or form a build up of gasses in the ball and body of the valve when it is in the closed position Ball is vented to the pressure (upstream) port allowing the interior of the ball and body to remain wetted to prevent the occurrence of decomposition and plating