K-T Industries 3-7540 Torch Check Valve Set

CGA B fittings (9/16 in to 18), includes both RH and LH. Check valves prevent reverse flow of gases which can cause dangerous mixtures. Check valves are not flash back arrestors and should not be used as such K-T recommends the use of check valves between the torch and regulators at all times. Contains both oxygen and fuel gas check valves.