Doorstep Delivery › Dura Manifold Coupling Image 1 of 1 Dura Manifold Coupling $20.05 1″ O-ring fitting for manifold assemblyEasy to maintain and service Purchase Added! 1″ O-ring fitting for manifold assemblyEasy to maintain and service You Might Also Like Hydro-Rain Manifold Cap Dura Manifold Elbow Dura Manifold Cap Dura Manifold Nipple Hydro-Rain Tee - Select