Review on Brass Control Device - Female Threaded Brass Check Valve by Brian Olson

on the OPD fitting on the cylinder but if the pigtail hose breaks all other cylinders connected to the To prevent this I used these check valves on each NPT manifold elbow and on the side of the tee to prevent this Propane pressure on the high side probably won't exceed 200psi on a really hot day. They open) and a very high flow rate in the direction of flow.The safety ball sits on a solid brass end therefore it cannot blow out even if the soft seat fails.As there are no external seams or seals that fail, they are ideal for use in permanent outdoor use.