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Oxygen & Acetylene/Propane Flashback Arrestors Set Regulator End 9/16-18 Threads B Size

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$14.99

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  • Flashback arrestor set has internal check valves for both oxygen and acetylene. The check valve design allows the flashback arrestor to guarantee that gas can merely flow in one direction instead of back flow to prevent accidents.
  • Standard -InchB-Inch fittings for 9/16 -18 threads, B size. Solid Brass construction for long life.
  • Attach at the regulator. Please note that the end of air inlet that connects flashback arrestor is reducing valve.
  • The maximum pressure of oxygen flashback arrestor is 15bar/210PSI. The maximum pressure of acetylene flashback arrestor is 1.5bar/21PSI.
  • The acetylene arrestor in this set can also be used for Propane or Mapp gas.


Never connect a torch to acetylene and oxygen tanks without installing a set of flashback arrestors in the hoses at the regulators.

Without these safety devices, it is possible a flash can occur within the hose, and ultimately follow back into the tanks, causing an explosion.

This would be an extremely rare occurrence, but flashback arrestors will make it a "never" occurrence.

Check valves are only a first line of defense and may not ultimately stop a flashback. Only the flashback arrestors will.


Trevor & Amber
Reviewed in the United States on September 21, 2023
I screwed these on my oxygen and acetylene hoses just before the torch and they fit nice and snug, didn't have any leaks. I can now rest assured that when I cut steel, I am doing it knowing that the tanks won't blow up due to a flashback. Please remember to check the direction on the arrestors as they are directional, there is an arrow that is clearly marked on both pieces.
L. Boston
Reviewed in the United States on August 17, 2023
My husband wanted a fancy torch setup for over 10-years. We've held out and tried to save money but to no avail. That said, he decided to build his own from the ground up.A full torch kit runs around 1k, so he started a budget project with no acetylene, but rather oxy & propane (yes he can!).The goal was first, easier, tighter plumbing work with BRAZE and without burning down a building. He of course had other goals with this project that included:The ability to silver sauter aluminium coils on HVAC and automobiles; to preheat miscellaneous materials for metal work and bending; for fastener removal; and lastly, for a fine pencil flame for jewelry work and electronic device repair.It took 6-months of collecting piece by piece while researching different products and measurements, and lots of trial and error. The results: a portable oxy/propane jewelers torch with a rosebud tip.The flashback arrestors were the final two parts he needed to complete his budget project. He is quite pleased with his handiwork and said it came out better than expected and exactly suited for his various needs (see pics).