The Barker 3" Auto-Drain RV Waste Valve allows you to dump your RV's black and gray water tank by just pushing a switch. It can be mounted on the slide valve of a 3" waste valve, providing consistent power and extending its life. Adjustments or clamps are not needed for the installation.

Makes it easier to get to hard to reach or difficult to operate valve areas.
Easy manual operation in case of low battery or valve troubles.
Material: Steel, aluminum, and plastic.
Made with durable material, the auto drain is corrosion resistant.
No additional plumbing fittings to install – none to remove.
Open and close in less than 7 seconds (3” model).
Holding tanks should be emptied before installation, this is highly recommended.
Red light switch warns when Auto Drain is open or opening.
Voltage: 12 Volts DC.
Amperage: 200 mA.
Cycle Time: 7 Seconds.
Compatibility: Valterra & Bristol 3" waste valves(not included).
It is not necessary to remove valves to install Auto-Drain.
Each Auto-Drain comes complete with a mounting bracket, rocker arm switch, switch box with light (indicates open or closed valve), complete installation and operating instructions.
Limited 1 year manufacturer warranty.
Made in USA.