Patented Auto-Drain provides convenient automatic 12-Volt push button operation of waste valves that open your RV's gray and black water holding tanks. Installs on your current waste valves, normally no plumbing modifications are required. 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. Limit switch protects motor. Rocker arm switch assembly has red light to indicate open or closed waste valve.
