Most RO unit fittings are quick disconnect water fittings, or RO push fittings, that allow RO tubing to be quickly inserted yet securely held. Want to know how to disconnect RO tubing from a John Guest Tee or elbow? First, it requires more finesse than force. Press down on both sides of the ring around the tubing with two fingers, then gently pull the tubing out. We carry every type of RO tubing connector, including a reverse osmosis garden hose adapter.