The Rhino Blaster Tank Rinser latches securely onto your RV sewer outlet. The 45-degree angle allows water to blast directly into the outlet, rinsing out residue. Rhino Blaster Tank Rinser features a clear elbow to see when the water runs clear. A vacuum breaker prevents backflow into the water hose. Additional features include a 4-prong bayonet swivel fitting that easily and securely attaches to the RV's sewer outlet, and a swivel lug fitting to connect to your sewer hose.