639422 - ESAB Fuel Gas Test Gauge 0-100 PSI B-Size Fitting

Stop Guessing, Start Measuring

Is your flame acting up? Are you suspecting your regulator is lying to you? The ESAB 639422 Fuel Gas Test Gauge is the troubleshooting tool every serious fabricator needs in their toolbox. When you are out in the field or working on a critical project, you can't afford to guess if you are getting the right pressure at the torch. This compact, rugged gauge screws directly onto your standard B-Size fuel hose or regulator outlet, giving you an instant, accurate reading of exactly what is going on in your line.

Designed specifically for fuel gases, this gauge features the standard Left-Hand threads (9/16"-18) you find on almost all acetylene and propane equipment. The 0-100 PSI range is perfect for covering everything from low-pressure acetylene work to higher-pressure heating applications with alternative fuels. If you are experiencing flame fluctuations, popping, or poor cut quality, the first step is checking your flow and pressure. Often, the gauge on an old regulator might be stuck or inaccurate, or you might be losing significant pressure through a long hose run. This test gauge tells you the truth.

Don't rely on "feel" or the sound of the gas. Precision matters in welding and cutting. By verifying your pressure at the torch end, you ensure your tip is getting the flow it needs to perform. It’s a small investment that saves you time, gas, and frustration. Whether you are setting up a new rig or diagnosing an old workhorse, the ESAB Fuel Gas Test Gauge gives you the confidence that your equipment is dialed in correctly.

Why You Need This

• Verify Regulator Accuracy: Old regulators can drift; check them against this calibrated gauge.
• Check Pressure Drop: See how much pressure you are losing through that 100-foot hose.
• Universal Fit: Fits any standard B-Size fuel connection (the one with the notch on the nut).
• Field Ready: Tough enough to bounce around in your truck and still read true.