Do gas regulators need to have check valves?
A gas check valve is a one way device allowing gas to flow only in one direction. When the gas is not flowing the check valve seals, preventing any back flow. Gas regulators designed for use in the draft beer industry include standard shutoff valves which do not have a check valve. This is because shutoffs with check valves are not required for the majority of draft beer dispensing applications as all standard keg couplers have a built in gas check valve. This prevents the back flow of beer from the keg into the regulator.
