Oxygen and fuel gas kept separately are not explosive. When mixed in a hose or regulator and then ignited, they can explode. Check valves prevent backup of gases into regulator so they cannot mix.
Harris Check Valves may be installed on any regulator outlets with standard 9/16"-18 tpi. connections.
Harris Check Valves may be installed on any regulator outlets with standard 9/16"-18 tpi. connections.