1 1/2" Waste Water Auto Drain Valve, 24140The NEW Auto-Drain mounts directly to a conventional 3 Inch or 1-1/2 Inch slide valve – no adjustments, and no difficult clamps to install or adjust. Eliminates hassles with hard to reach and difficult to operate valve locations. Compatibility: Valterra And Bristol Slide Valves To Dump Black And Gray Water Tanks Type: Auto Drain Valve Operating Type: Electric Size: 1-1/2 Inch With Cap: No With Mounting Hardware: Yes Easy, Manual Operation In Case Of Battery Failure Or Valve Problems Constructed Of Corrosion-Resistant Steel, Aluminum, And Plastic No Additional Plumbing Fittings To Install Holding Tanks Do Not Have To Be Dumped To Install Limited 1 Year Warranty