Using this Camco RhinoFLEX 4 - in - 1 Elbow Adapter is easy. First, select the appropriate size that matches your dump station inlet. Then, connect the adapter to the dump station. The swivel bayonet fitting allows you to rotate it to the right position for a smooth connection. You can watch through the clear elbow to know when the sewer hose is fully drained. When you're done, detach the elbow from the 4 - in - 1 adapter and store it in your 4 - inch square RV bumper. As for maintenance, after each use, rinse the adapter with clean water to prevent blockages. Keep it in a dry place to avoid damage. Make sure the gasket is in good condition for an odor - tight connection. If you notice any signs of wear, consider replacing the parts.