Flashback arrestors are a combination reverse flow check valve and flame barrier in one body. They provide protection against flashback and the reverse flow of gases to the operator at the torch. 
Specifications
Connection:
- Inlet: 9/16" UNF (CGA Class "B" Connection) M
 
- Outlet: 9/16" UNF (CGA Class "B" Connection) F
 
- Part Number: 616226-02070