The jet stream spray from the No-Fuss Flush unit removes and flushes away deposits from inside the holding tank. Installs permanently to waste or gray-water tank. Rinses tank quickly and easily. Eliminates the need to drag a hose inside the RV to flush out the holding tank. Connect No-Fuss Flush to outside wall of RV for easy hook-up. Check valve included. Accessory kit has chrome-plated inlet and fittings. Order the Accessory Kit with the No-Fuss Flush. Kit includes a chrome-plated water inlet, plus 2 hose couplings and hose adapter. The water inlet mounts to the exterior of your RV.