Thermal Arc Water Cooler Flow Indicator Assembly

Keep Your Coolant Flowing with the Thermal Arc Sight Glass

Is the sight glass on your water cooler cracked, leaking, or so cloudy you can't tell if the water is moving? The 4120-2012 Sight Glass Assembly is the direct replacement part you need to get your TIG or MIG cooling system back in top shape. A functioning sight glass is your first line of defense against a burned-out torch—if the water stops moving and you don't see it, you risk expensive equipment damage.

This genuine OEM part is designed for Thermal Arc and Tweco water coolers. It swaps out easily with your old, damaged unit, providing a clear window into your cooler's operation. Whether you are running a busy fab shop or a home garage setup, knowing your coolant is circulating gives you peace of mind during long welds at high amperage.

Don't rely on guesswork or wait for your torch to get hot. Maintenance of your water cooler is just as important as maintaining your power source. This assembly is built to resist the heat and chemicals found in welding environments, ensuring it stays clear and leak-free for years to come.

Why Replace Your Sight Glass?

• Visual Safety: Instantly verify pump operation before striking an arc.
• Leak Prevention: Old seals and cracked plastic are common sources of messy coolant leaks.
• Equipment Longevity: Protect your expensive water-cooled torches from overheating.