042288 - Miller Coolmate 4 Water Cooler 115V

The Best Performer in Its Class

When your welding projects demand high amperage and long arc times, heat becomes your enemy. The Miller Coolmate 4 (115V) is the industry standard for keeping water-cooled TIG torches and MIG guns operating at peak performance. Whether you are working in aerospace, manufacturing, or heavy fabrication, this 4-gallon cooler ensures your equipment stays cool, preventing overheating that can damage expensive torches and lead to downtime. With its ability to handle equipment rated up to 600 amps, the Coolmate 4 is the reliable partner your heavy-duty welder needs.

Built Tough for the Shop

Miller knows that shop equipment takes a beating. That's why the Coolmate 4 is built with a rugged, one-piece polyethylene case that will never rust, dent, or corrode. It’s tough enough to sit under a workbench or on a running gear, yet light enough (38 lbs dry) to be moved around the shop using the convenient molded handle. The design is practical, too—the filler spout is integrated right into the case for easy top-offs, and the coolant filter is right up front, so you can check it without hassle. No tools are required to keep an eye on your coolant quality.

Reliable, Consistent Cooling

Inconsistent cooling can lead to fluctuating arc characteristics and uncomfortable torch handles. The Coolmate 4 uses a high-quality rotary vane pump—not a cheaper submersible pump—to drive coolant consistently through the lines. This positive displacement pump ensures that pressure remains steady at 60 PSI, giving you the flow you need for demanding jobs. The 1/4 HP motor is thermally protected, meaning it works as hard as you do without burning out. By circulating fluid constantly, the system also fights algae growth, keeping your lines clean and your flow unrestricted. Invest in the Coolmate 4 to extend the life of your consumables and improve your weld consistency.