Valterra A70 No-Fuss Flush with Check Valve 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, Connect No-Fuss Flush to outside wall of RV for easy hook-up Eliminates the need to drag a hose inside the RV to flush out the holding tank 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