BARKER 3" Auto Drain RV Slide Valve Actuator Kit — 12V Automatic Retrofit with Indicator Light

The BARKER 24130 3" Auto Drain is a 12V automatic actuator kit that converts a 3" RV slide waste valve into a push-button, fully automatic dump valve for gray and black tanks.

This retrofit kit lets you operate conventional 3" RV waste valves electronically without cutting or re-plumbing your drain lines. Designed to mount directly to the slide valve arm on Valterra and Bristol 3" (and compatible 1.5") waste valves, the unit uses corrosion-resistant metals and plastics and provides a visible indicator light showing open or closed position. Installation is straightforward for users comfortable with basic hand tools and 12V wiring, and the unit cycles quickly to fully open or close the valve.

How quickly does the Auto Drain open and close?

The 3" model completes a full open or close cycle in under 4 seconds, giving you fast, reliable operation when dumping tanks. The quick action reduces the time the valve is partially open, minimizing drips and helping a cleaner dump.

• Cycle time: less than 4 seconds for the 3" model
• Consistent motion: powered actuator replaces manual arm movement
• Indicator light: instantly shows whether valve is open or closed

Will this mount to my existing Valterra or Bristol waste valve?

The kit is engineered to clamp onto the slide valve arm of common Valterra and Bristol 3" (and many 1.5") waste valves without modifying plumbing. Confirm your valve model and slide-arm configuration before purchase to ensure compatibility.

• Compatibility: Valterra and Bristol 3" waste valves (also fits many 1.5" models)
• No plumbing modifications required: mounts to the existing slide valve arm
• Universal fit approach: bracket and rocker arm included for adaptable installation

What are the electrical and material specifications I should know?

The Auto Drain runs on 12V DC and draws about 200 mA, making it suitable for typical RV electrical systems. Components are selected to resist corrosion and outdoor exposure to prolong service life.

• Voltage: 12V DC, typical RV electrical standard
• Amperage: approximately 200 mA during operation
• Materials: corrosion-resistant steel, aluminum and plastic components

What comes in the box and how difficult is installation?

The kit ships with everything required to convert a slide valve to automatic push-button operation: a mounting bracket, rocker arm linkage, illuminated switch box, indicator light, and full installation instructions. Basic mechanical aptitude and simple wiring skills are usually sufficient; no specialized tools or tank modifications are necessary.

• Included: mounting bracket, rocker arm switch assembly, illuminated switch box with light
• Documentation: complete installation and operating instructions included
• Preparation: empty holding tanks before installing to avoid spills

Who this product is for: RV owners who want a cleaner, faster, and more convenient way to dump gray and black water tanks without reworking existing plumbing will benefit from the BARKER 24130 Auto Drain. It suits owners of motorhomes, travel trailers, and fifth wheels using Valterra or Bristol style slide valves who prefer a low-current 12V solution with corrosion-resistant parts and a clear open/closed indicator. If you need a heavy-duty retrofit that reduces manual handling of the waste valve and speeds the dumping process, this kit provides a straightforward upgrade.