Smith H743 Torch Mount Flashback Arrestor Set (Oxygen/Fuel)

Stay Safe with Smith Torch Mount Flashback Arrestors

Safety should never be an afterthought when working with oxy-fuel equipment. The Smith H743 Torch Mount Flashback Arrestor set provides essential protection for welders and fabricators, giving you peace of mind every time you light the torch. Flashbacks—where the flame travels backwards into the equipment—can happen in an instant, often causing hose explosions or regulator damage. This pair of arrestors is designed to stop that flame dead in its tracks right at the torch handle, keeping the fire away from your gas supply and, more importantly, away from you.

Installation is incredibly simple. These arrestors screw directly onto the inlet connections of your cutting torch or welding handle. Because they use standard "B" size fittings (9/16" - 18), they fit almost all major brands of torches, including Miller, Smith, Victor, and Harris style equipment. Once installed, they work automatically. You don't need to worry about flipping switches or resetting levers; the internal check valves constantly monitor gas direction to ensure flow only goes one way—out to the tip. If a reverse flow situation occurs, the valve shuts instantly.

Beyond the check valve, the H743 features a high-tech sintered metal filter inside the brass body. This filter acts like a firewall. If a flame ever tries to race back up the torch, it hits this filter and is instantly extinguished. This dual-layer protection handles both gas mixing issues and actual fire events. Despite this heavy-duty protection, Smith has engineered these arrestors to allow high gas flow, so you won't notice a drop in performance whether you are heating, welding, or cutting thick steel. Rugged, reliable, and essential for any gas rig, the H743 set is a small investment that offers massive safety benefits for your shop or garage.