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108778 - Miller 108778 P12 O-Ring Replacement Seal (Pack of 3)

Packaging: 3 PER EA
$21.94/EA $46.35/3 PER EA only $15.45/EASave 30%

Usually ships within 3-5 business days

OVERVIEW

Maintain Peak Performance with Miller OEM Seals

Keep your welding setup running smoothly with the Miller 108778 O-Ring (P12), available in a value-oriented 3-pack. Welding equipment relies on a complex network of connections to deliver power, shielding gas, and coolant to the arc. Over time, the rubber seals at these connection points can dry out, crack, or compress, leading to leaks that are often difficult to diagnose but detrimental to performance. This genuine Miller replacement part is the exact solution needed to restore factory-tight seals and prevent the headaches associated with equipment failure.

The P12 designation refers to the specific dimensional standard of the O-ring, ensuring it fits perfectly into the machined grooves of your Miller equipment. Using an incorrect or generic O-ring can result in a poor fit, which may pinch during installation or fail under pressure. The Miller 108778 is manufactured from high-grade elastomer materials designed to resist the harsh conditions of a welding shop, including exposure to ozone, oils, and varying temperatures. This durability translates to longer service intervals and fewer interruptions during critical jobs.

This product is an essential item for any welder's maintenance kit. Whether you are repairing a MIG gun connection, a TIG torch coolant line, or internal machine plumbing, having fresh O-rings available can save hours of downtime. Don't let a ten-cent seal cause a thousand-dollar problem. Invest in genuine Miller components to ensure your gas coverage remains consistent and your cooling systems remain watertight. With this 3-pack, you have the assurance of quality that comes with the Miller name, backed by the reliability required for professional welding applications.

Additional Information
Brand:Miller
Item:O-Ring
Packaging Description:3 Per Ea
Part Type:Replacement Seal
Size Standard:P12
Compatibility:Miller Welding Equipment

INCLUDED

  • 3 x Miller 108778 O-Rings (P12)

APPLICATIONS

  • Sealing shielding gas connections in welding machines.
  • Repairing coolant lines in water-cooled TIG and MIG systems.
  • General maintenance of Miller power sources and wire feeders.
  • Replacement of worn or dried-out seals during equipment overhaul.

FAQ

This O-ring is a P12 size, which typically corresponds to an inner diameter of approximately 11.8mm and a cross-section thickness of 2.4mm.

The Miller 108778 comes as a package of 3 O-rings.

Yes, this is a genuine OEM Miller Electric replacement part, ensuring correct fitment and material quality.

Generic O-rings may not have the exact dimensional tolerance or material resistance required, leading to potential leaks of gas or coolant.

You should check your specific machine's parts manual or breakdown diagram for the part number 108778 to verify fitment.

While the exact compound is proprietary to the application, it is a high-grade elastomer designed for industrial sealing environments.

It depends on the specific location in the machine; however, O-rings of this type are generally used for sealing both gas and liquid lines where specified.