How-To Blogs & Videos

If your air compressor isn’t holding pressure like it used to, a worn-out compression ring might be the culprit. Also called a piston ring, cylinder ring, or o-ring (depending on the design), this small but mighty component plays a big role in maintaining your compressor’s performance. Here's what you need to know. What Does a Compression Ring Do? The compression ring sits around the piston inside the pump cylinder. As the piston moves, the ring forms a tight seal against the cylinde …

This short video shows how to install a piston compression ring (or o-ring) on an air compressor. The compression ring on a piston head is a wear and tear item. It is, often, a cause of an air compressor failing to produce air. Please check your manual or call the manufacturer for information on your particular unit.  …