Barker 24130 Auto-Drain Valve - 3 inch

Auto Drain provides complete automatic 12 volt push button operation of the valves that dump your RV's gray and black water holding tanks. Installs on your current slide valves in less than an hour and gives you a more sanitary procedure; no plumbing modifications are required. Available in two models one for 1 1/2" gray water valves and one for 3" black water valves. Both models are made of corrosion resistant materials: stainless steel, aluminum, and plastic. Comes complete with rocker arm switch assembly.