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 Dura Manifold Cap Hydro-Rain x Blu-Lock Transition Adapter - Select Hydro-Rain Manifold Female Adapter Dura Manifold Tee - Select Hydro-Rain Tee - Select