The DS2000 re-settable flashback arrestor has several safety features. The thermal shut-off valve stops the gas flow in the case of a hose burn back. The integrated flame barrier extinguishes the flashbacks and protects the valve to make sure it works safely even after a flashback. In order to continue working the user has to look for the cause of the flashback. Once the problem is corrected, the safety device is reset and work can be continued.