Camco Toilet Flush Valve Prop easily installs around the body of your RV Waste Tank Rinser and props open the toilet waste valve while you clean. Using a Flush Valve Prop makes it easier to clean the waste tank without having to hold down on a foot pedal, and also helps prevent damage to the waste valve. The tapered design helps prevent splash back, and the ridges helps keep the prop in place. The Valve Prop fits all tank rinsers and is easy to install with all hardware included.