Camco 3.5" RV Clear Sewer Hose Adapter attaches directly to the RV's sewer connection, extending the sewer hose outlet for easier, more convenient hose connection. The clear adapter allows to see when the tank is fully rinsed. It is non-restrictive and allows free flow of water. Attaches directly to the RV outlet connection Extends RV sewer outlet connection for easier hookup Clear adapter allows to see when tank is fully rinsed 3.5" in length Easy to use and store