Class 300 WCB Cast Steel Gate Valve 4 Inch Class 300 WCB Gate Valve CLASS 300 WCB Gate Valve 300 WCB Cast Steel Gate Valve Class 300 Cast Steel Gate Valve 18 Inch Class 150 WCB Cast Steel Gate Valve Class 150 WCB Cast Steel Gate Valve 10 Inch Class 300 Flange End WCB Gate Valve WCB Cast Steel Gate Valve 2 Inch Cast Steel Gate Valve