12Y25 - ESAB V31 Pilot Light Mixer and Stem Assembly

Restore Your Torch's Ignition Reliability

There is nothing more frustrating than a cutting torch that refuses to light or a pilot flame that keeps sputtering out right when you are ready to make a cut. The ESAB 12Y25 Pilot Light Stem & Mixer Assembly V31 is the genuine repair part you need to get your equipment firing on the first try, every time. If you are running a V31 system and noticing that your pilot light is weak, inconsistent, or prone to popping, the issue often lies within the mixer or stem assembly where carbon buildup or wear can disrupt the gas flow.

This assembly takes care of the most delicate part of the flame generation process: the mixing. It blends your oxygen and fuel gas right before the ignition point, ensuring a crisp, hot pilot flame that stays lit even in drafty shop environments. Made from durable brass, it stands up to the heat and abuse of daily welding and cutting work. Replacing a worn mixer is a smart, proactive maintenance step that protects your torch from overheating and prevents the dangerous conditions associated with poor ignition, such as gas buildup.

Installation is straightforward for experienced technicians. The part is designed to fit perfectly into your existing V31 setup without the need for modification or forcing. By swapping out your old, clogged, or damaged stem and mixer with this fresh OEM unit, you restore the factory-level performance of your torch. You get a clean light-up, a stable flame, and the confidence that your equipment is safe to operate.

Don't let a ten-dollar problem hold up a thousand-dollar job. Keep your oxy-fuel gear in top shape with the ESAB 12Y25. It’s built to handle the rigors of the trade, giving you the control and reliability you expect from a top-tier brand like ESAB. Whether you are cutting thick plate or doing precision shape cutting, a reliable pilot light is the first step to a quality cut.