Today, we're going to be taking a look at the RhinoFLEX RV sewer hose swivel elbow fitting with a 4-in-1 adapter. This elbow fitting is going to connect to your RhinoFLEX sewer hose to make draining your RV's black water tank much easier. These two components fit together so this would go to the dump station. This is your 4-in-1 adapter, then you got the elbow fitting, and then your RhinoFLEX hose… see more >