JB manufactures our quick couplers at the facility in Aurora, Illinois. 1/4 couplers have a valve core depressor, safety channels and rubber gasket seal. JB machines all of the access valves using the highest level of brass consisting of 65% copper and 35% zinc. This gives our brass fittings and access valves high tensile strength while resisting corrosion. Many import fittings use lower quality brass with lower copper content, resulting in higher failure rates. JB machines all of our valves to the strict guidelines of the ARI to ensure proper sealing of the valve and core surfaces. Our access fittings have generous counter bores to allow for the removal of the core if the flare becomes damaged.