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C400 - 1.5-Inch Replacement Regulator Gauge 0-400 PSI 1/8 NPT

Packaging: 1 of 1
$14.10/ea

Usually ships within 3-5 business days

OVERVIEW

Fix Your Regulator with the C400 Replacement Gauge

A cracked or stuck gauge on your welding regulator isn't just an annoyance; it's a safety hazard and a productivity killer. The Techniweld C400 is the perfect replacement part to get your gear back in working order. With a 0-400 PSI range, this gauge is commonly used for reading delivery pressure on heavy-duty regulators or cylinder pressure on acetylene tanks. Don't guess your settings—know them with a crisp, easy-to-read dial.

Designed for the welder who needs reliable gear, this gauge features a standard 1-1/2 inch face and a 1/8" NPT brass connection. It screws directly into the port of most standard regulators found in fab shops, garages, and industrial sites. The white face with high-contrast markings ensures you can read the pressure at a glance, even through a scratched lens or in dim lighting conditions. It's built tough to handle the vibration and knocks that come with portable welding carts and bench work.

Installation is straightforward: simply remove the old damaged gauge using a wrench on the brass stem (never twist the case!) and thread in the new C400 with a bit of Teflon tape or thread sealant appropriate for the gas service. Within minutes, your regulator will look and function like new. Whether you are MIG welding, TIG welding, or cutting with oxy-fuel, accurate pressure readings are the key to a stable arc and a clean cut.

Why Choose This Replacement?

  • Universal Fit: The 1/8" NPT thread fits almost all standard small-frame regulators.
  • Clear Readings: 0-400 PSI scale covers the sweet spot for many delivery applications.
  • Tough Build: Designed to withstand the rigors of the welding shop.
  • Safety First: Replace broken lenses or stuck needles to ensure safe operation.
Additional Information
Diameter:1.5"
Max Psi:400
Used On A:Regulator
Used On Which Gas:Acetylene, Oxygen or Inert Gases
Connection Size:1/8" NPT
Mount Type:Bottom Mount
Case Material:Steel
Lens Material:Polycarbonate
Packaging Description:1 of 1
Which Side?:n/a
Used On Which Gas?:Oxygen or Inert Gases
Max Psi?:400psi

INCLUDED

  • 1 x 1-1/2" Pressure Gauge (0-400 PSI)

APPLICATIONS

  • Replacement gauge for welding gas regulators
  • Acetylene cylinder pressure monitoring
  • Oxygen delivery pressure monitoring
  • Inert gas delivery pressure monitoring
  • Pneumatic system pressure indication

FAQ

The gauge features a 1/8" NPT (National Pipe Taper) male thread, which is the standard connection for most 1.5" welding regulator gauges.

Yes, welding gauges like the C400 are typically manufactured 'cleaned for oxygen service' to ensure safety, though you should always keep the threads free of oil and grease during installation.

Yes, a 0-400 PSI gauge is often used to indicate the cylinder pressure on acetylene regulators, as acetylene cylinders are pressurized to approximately 250 PSI.

Unscrew the old gauge using a wrench on the brass square stem. Apply a small amount of oxygen-safe thread sealant or Teflon tape (starting one thread back) to the new gauge, and tighten it into the port using a wrench on the stem. Do not tighten by gripping the round case.

The dial diameter is 1-1/2 inches, making it a compact option suitable for most standard regulators.

The '400 lb' marking indicates the maximum pressure reading of 400 PSI (Pounds per Square Inch).

If the flowmeter has a pressure gauge port with 1/8" NPT threads requiring a 0-400 PSI range, yes. However, many flowmeters use calibrated tubes rather than pressure gauges for flow, so check your specific equipment.

These gauges typically feature a painted steel case for durability in industrial environments.