This little piece basically joins sections of your air brake line together. Think of it like a connector, making sure the air pressure can flow smoothly from the compressor, through the system, and to the brakes. It's designed to be a tight, secure connection – it doesn’t really do anything beyond that, it just allows everything else to do its job. They come in different sizes, obviously, to match the tubing you're using. It’s part of the air brake system, which, as you probably know, stops big vehicles. Specifically, the coupling is just one point in that entire air line. Air pressure builds up, and when you hit the brake pedal, it releases that pressure to the brake chambers, which activate the brakes. The coupling simply ensures there aren’t any leaks or interruptions in that air flow between sections of the line. It’s not a glamorous part, but it's critical. Because if it fails, you’ve got an air leak. Air leaks in a brake system are a big deal. Even a small leak can reduce your braking power and that's obviously dangerous. You’ll notice if one develops – you might hear a hissing sound, or your air compressor might run more often trying to maintain pressure. It acts like a shield against air escaping. These aren’t typically something you’d replace unless you’re already working on the air lines, or if you identify a leak specifically at the coupling itself. You can find a good selection of these, and pretty much any air brake part you might need, over at Fixparts Online. Just make sure you get the right size for your lines. What sets us apart: Straight Coupling (MPN 8938214300) includes a 12-month warranty!

About Wabco

WABCO is a global innovator in braking, stability, and suspension systems for commercial vehicles, enhancing safety and efficiency.

Why Choose Wabco?

• Wabco parts are known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, covering many different makes and models of vehicles. • Our parts are made to meet or beat the quality of original equipment, so you can trust their performance. • Wabco offers great customer support to help you find the right parts and answer any questions you may have. Wabco delivers excellence, FixParts Online delivers to your door.