1 1/2 " WASTE TANK SLIDE DRAIN VALVES Fixed to fresh or grey waste tanks for quick emptying. Just pull on handle to open the blade valve. Installed by fixing tank adaptor flange (use SV152) to tank with large self-tapping screws or bolts sealed with silicone sealant. Valve can be fixed to adaptor by solvent cement (plumbing glue) in a position to suit easy access for emptying. Can be installed remotely from tank with 40mm inlet adaptor & 40mm Supaflex hose. Outlet extension hose can easily be connected with bayonet hose adaptor. Made from impact resistant black ABS with nitrile and EPDM seals.