2-Inch Acetylene Cylinder Pressure Gauge, 0-400 PSI Inlet

Restore Your Regulator's Performance

A broken gauge shouldn't mean the end of the line for your trusty welding regulator. The Replacement 2-Inch Acetylene Gauge (400 PSI) is the perfect solution for welders looking to repair their equipment without breaking the bank. Gauges are often the first casualty in a busy shop or on a rough job site—smashed lenses, bent needles, or crushed cases are all too common. This high-quality replacement gauge allows you to swap out the damaged part and get your regulator back in service in minutes, saving you the cost of buying a completely new regulator assembly.

This gauge is designed as a direct fit replacement for the high-pressure (inlet) side of most standard acetylene regulators. It features the common 1/4-inch NPT male thread at the bottom, which screws directly into the gauge port of brands like Victor, Harris, Smith, and many generic imports. The 0-400 PSI range is specifically intended to read the tank pressure, letting you know exactly how much acetylene is left in your cylinder so you don't run dry in the middle of a critical cut or braze.

Built for the Shop

We know that welding equipment takes a beating. That's why this gauge features a durable metal case and a clear, tough lens designed to resist clouding and scratching. The 2-inch face is the standard size for a reason—it fits neatly on the regulator body without sticking out too far, yet remains large enough to read easily even when you have your helmet raised and safety glasses on. The markings are crisp and distinct, ensuring you never have to guess your pressure levels.

Easy Installation

Installing this replacement gauge is straightforward. Simply ensure the cylinder valve is closed and the regulator is depressurized. Remove the old, damaged gauge with a wrench, clean the threads, apply a small amount of PTFE tape (approved for gas service) to the new gauge threads, and screw it in until tight and oriented correctly. It’s a simple maintenance task that extends the life of your tools and keeps your oxy-acetylene outfit running safely and smoothly. Don't let a broken gauge compromise your safety or your schedule; keep a spare on hand and keep welding.