BARKER 24130 3" Auto Drain

Auto-Drain provides completely automatic 12-volt push button operation of the valves that dump your RV/'s grey and black water holding tanks.It mounts onto the slide valve of a 3 or 1.5 conventional waste valve and no plumbing modifications or difficult clamps are required.Works with Valterra and Bristol 3 and 1.5 waste valve models (not included).Auto-Drain Valves are made of corrosion-resistant steel, aluminum and plastic.Before installing, your holding tanks should be emptied.There is an open or close cycle in less than 4 seconds for the 3 models.Included with the Auto-Drain Valve is a mounting bracket, rocker arm switch, switch box with light (indicates open or closed valve) and complete installation and operating instructions.'