RO Elbow Fitting (1/4 Thread x 1/4 Quick Connect) The RO Elbow Fitting (1/4 Thread x 1/4 Quick Connect) connects 1/4" RO tubing to a compatible threaded port while turning the tubing connection at a right angle. Right-Angle RO Connection This elbow fitting is useful when space is tight behind an RO/DI unit, storage container, float valve, membrane housing or other water-system component. Elbow Fitting Details 1/4" MPT x 1/4" quick-connect elbow fitting. Designed for rigid 1/4" RO tubing. Right-angle shape helps route tubing cleanly in tight spaces. Useful for RO units, ATO reservoirs and custom aquarium water plumbing. Directions Install the threaded end into a compatible 1/4" threaded port using suitable thread sealant or tape if needed. Push cleanly cut RO tubing fully into the quick-connect side, then pressurize the line and check carefully for leaks. What's Included 1 RO Elbow Fitting - 1/4 thread x 1/4 quick connect.