The Rhino Blaster Pro Tank Rinser latches securely onto your RVs sewer outlet. The 45 degree angle allows water to blast directly into the outlet, rinsing out residue. Blaster Pro Tank Rinser features a clear elbow to see when the water runs clear. A gate valve prevents waste from flowing through the hose until done rinsing the tank, and the 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.