Western Brass Nipple: 1/4; NPT, 2 1/2; Long w/CV
Nipples with integral check valves are designed to provide additional safety in Manifold Systems and other equipment.
Check Valve Nipples can be built into Pigtails, Tee Connections and Manifold Blocks to resist back flow of gases from lines, equipment and cylinders.
Check valves are factory installed and 100% tested.
Check valves are for reverse flows only - they care not to be used as Flashback Arrestors.