691574 - 1/4 Inch NPT Pressure Plug

Reliable Gas and Fluid Control for Welding Setups

In any professional welding shop, the reliability of your equipment often comes down to the smallest components. The ESAB 691574 Pressure Pipe Plug (1/4-18 NPT) is an essential fitting for welders and fabricators who maintain their own gear. Whether you are configuring a custom gas manifold, capping off an unused outlet on a regulator, or sealing a port on a water-cooling system, this plug delivers the performance you need. Leaks in a welding environment are more than just a nuisance; they can waste expensive shielding gas, compromise weld quality due to atmospheric contamination, or create safety hazards.

This plug features a 1/4-18 NPT thread, a common size found on many regulators, flowmeters, and machine connections. The NPT (National Pipe Taper) design ensures that as you tighten the plug, the threads wedge together to form a tight, pressure-resistant seal. This is particularly important for high-pressure gas cylinders and delivery lines where a secure fit is non-negotiable. When paired with a quality thread sealant or Teflon tape, this plug ensures that your argon, CO2, or mixed gas stays exactly where it belongs—inside the line until it reaches the torch.

Durability is key in a workshop environment. Equipment gets moved, bumped, and exposed to heat and sparks. The ESAB 691574 is built to handle the tough conditions of a fabrication floor. It resists cross-threading when installed correctly and holds up against the internal pressures typical of welding support equipment. It is an ideal spare part to keep in your maintenance kit, ensuring that you aren't left scrambling when you need to reconfigure a machine or plug a leak quickly to get back to work.

Using genuine or high-quality replacement parts like this pressure plug ensures compatibility with your existing ESAB equipment and other standard industrial fittings. It eliminates the guesswork of trying to fit mismatched threads, which can damage expensive regulators or manifolds. For welders who demand consistency and safety in their gas and fluid delivery systems, this pressure plug is a small but mighty component that helps keep the arc burning and the shop running smoothly.