The Barker Auto-Drain RV Waste Valve allows you to dump your RV’s gray water tank by just pushing a switch. It can be mounted on the slide valve of a 1-1/2″ waste valve, providing consistent power and extending its life. Adjustments or clamps are not needed for the installation.
• Auto-drain makes it easier to get to small valve areas that are difficult to operate
• Easy manual operation in case your RV battery is low or you run into valve complications
• Hard-wearing steel, aluminum, and plastic construction
• Corrosion resistant for long extended use
• No supplemental plumbing fittings to install
• Auto-drain opens and closes automatically
• Highly recommended to empty your holding tank prior to installation to avoid messes
• Red light switch alerts you when the Auto Drain is open or opening
• It’s not necessary to remove valves to install Auto-Drain
• Fits Valterra and Bristol 1-1/2″ waste valves
• Voltage: 12V DC
• Amperage: 150 mA
• Cycle Time: 3 seconds
• Comes complete with mounting bracket, rocker arm switch, switch box with light, complete installation, and operating instructions
Before You Order
Confirm your gray-water installation uses a 1-1/2-inch waste valve, especially the recommended Bristol size, and verify 12V DC power and mounting space for the bracket, rocker switch, and illuminated switch box.
Frequently Asked Questions
What waste valve size is this unit designed to mount on?
The description says it mounts on the slide valve of a 1-1/2-inch waste valve and recommends Bristol 1-1/2-inch waste valves.
What parts are included with the auto-drain valve?
The listing includes a mounting bracket, rocker arm switch, illuminated switch box, installation and operating instructions.
What electrical specifications are listed?
The unit is rated 12V DC and 150 mA, with a 3-second cycle time.




