Flashback arresters are important safety components for oxy-fuel welding and cutting systems. They are used to help reduce the risk of flame travel or reverse gas flow in oxygen and acetylene lines.
This collection includes Pinnacle-branded brass 3/8" flashback arresters for oxygen and acetylene applications, with regulator-side and torch-side options available. Oxygen versions are marked P.MAX 15 bar / 210 psi, while acetylene versions are marked P.MAX 1.5 bar / 21 psi. Always choose the correct arrester according to the gas type, installation point, pressure rating and connection size required by your equipment.
Flashback Arresters for Gas Welding and Cutting
A flashback arrester is a safety device used in oxy-fuel welding and cutting setups. Its purpose is to help protect the gas line, regulator and torch from flashback-related hazards. In workshops, fabrication sites and cutting operations, flashback arresters are commonly used as part of a safer oxygen and fuel gas system.
Pinnacle flashback arresters are supplied as gas-specific options for oxygen and acetylene lines. They are suitable for compatible gas welding and cutting setups where a 3/8" brass connection is required.
Oxygen vs Acetylene Flashback Arresters
Oxygen and acetylene flashback arresters are gas-specific and should not be mixed or substituted. An oxygen flashback arrester should be used on the oxygen line, while an acetylene flashback arrester should be used on the fuel gas line.
The oxygen version is marked P.MAX 15 bar / 210 psi. The acetylene version is marked P.MAX 1.5 bar / 21 psi. Before ordering, confirm the correct gas type and pressure rating required for your regulator, hose or torch setup.
Regulator-Side vs Torch-Side Flashback Arresters
Flashback arresters may be fitted at the regulator side, torch side, or both, depending on the equipment setup and workplace safety requirements. Regulator-side flashback arresters are installed near the gas regulator, while torch-side flashback arresters are installed closer to the welding or cutting torch.
This collection includes both regulator-side and torch-side options. Select the correct version according to where the arrester will be installed in your oxy-fuel welding or cutting setup.
Choosing the Correct 3/8" Flashback Arrester
When selecting a flashback arrester, check four key details: the gas type, the installation point, the pressure rating and the connection size. This collection includes Pinnacle-branded brass 3/8" options for oxygen and acetylene, available for regulator-side or torch-side use.
- Gas Type: Oxygen or acetylene
- Installation Point: Regulator-side or torch-side
- Pressure Rating: Oxygen P.MAX 15 bar / 210 psi; Acetylene P.MAX 1.5 bar / 21 psi
- Connection Size: 3/8"
Always confirm compatibility with your regulator, torch, hose assembly and workplace safety requirements before installation.
How to Choose the Correct Flashback Arrester
| Selection Point | What to Check |
| Gas Type | Choose oxygen for oxygen lines and acetylene for acetylene lines. The two versions are not interchangeable. |
| Installation Point | Select regulator-side or torch-side according to where the arrester will be fitted in your setup. |
| Pressure Rating | Oxygen versions are marked P.MAX 15 bar / 210 psi. Acetylene versions are marked P.MAX 1.5 bar / 21 psi. |
| Connection Size | Confirm that a 3/8" brass connection is compatible with your regulator, torch or hose assembly. |
Important Safety Note
Flashback arresters should be installed, inspected and maintained according to your equipment requirements and workplace safety procedures. Replace damaged, contaminated or worn components immediately. If you are unsure which option is suitable, consult a qualified welding or gas equipment technician before use.
Frequently Asked Questions
What is a flashback arrester used for?
A flashback arrester is used in gas welding and cutting systems to help reduce the risk of flame travel or reverse gas flow through the hose, regulator or torch setup.
Do I need different flashback arresters for oxygen and acetylene?
Yes. Oxygen and acetylene flashback arresters are gas-specific. They should not be mixed, swapped or used as substitutes for each other.
What is the maximum pressure rating?
The oxygen flashback arrester is marked P.MAX 15 bar / 210 psi. The acetylene flashback arrester is marked P.MAX 1.5 bar / 21 psi. Always select the version that matches the correct gas line and equipment requirements.
Should a flashback arrester be fitted on the torch or regulator?
Flashback arresters can be fitted at the regulator side, torch side, or both, depending on the gas equipment setup and safety requirements. This collection includes both regulator-side and torch-side options.
What size are these flashback arresters?
The flashback arresters in this collection use a 3/8" brass connection. Please confirm compatibility with your regulator, torch or hose assembly before ordering.
Is “flashback arrestor” the same as “flashback arrester”?
Yes. Both terms are commonly used. “Flashback arrester” is the preferred spelling on this page, while some users may also search for “flashback arrestor”.