Never ever attach a torch to acetylene and oxygen containers without installing a collection of flashback arrestors in the tubes at the regulators. Without these safety and security gadgets, it is possible a flash can take place within the hose, and inevitably adhere to back right into the containers, triggering an explosion. This would be an extremely rare event, but flashback arrestors will make it a "never" event. Examine shutoffs are only a first line of protection and may not inevitably quit a recall. Only the flashback arrestors will.
Flashback arrestor set has internal check valves for both oxygen and acetylene
Standard -InchB-Inch fittings for 9/16 -18 threads,B size.
Attach at the regulator.
NOTE: The acetylene arrestor in this set can also be used for Propane or Mapp gas.