How-To Blogs & Videos

When your air compressor runs for what seems like no reason, or you hear a constant hiss, a tiny but vital part may be the culprit: the check valve. At Master Tool Repair, we've helped countless customers diagnose this common issue, and we're here to explain why this small component is so important. What is an Air Compressor Check Valve? The check valve is a one-way valve located on your air compressor's tank. Its primary job is to allow compressed air to flow from the pump into the tank, but pr …

Air compressors are essential tools, but when they start acting erratically – either short cycling (turning on and off frequently) or running continuously – it can be incredibly frustrating and costly. This improper pressure regulation not only hinders your work but can also indicate underlying issues that need immediate attention. Why Your Compressor Might Be Short Cycling Short cycling occurs when your air compressor turns on and off too frequently. This can lead to increased wear …

Welcome to our new "Part of the Week" series! This week, we're shining the spotlight on a crucial component of your air compressor: the check valve.What is a Check Valve? A check valve, also known as a one-way valve or non-return valve, is a small but mighty device that plays a big role in your air compressor's functionality. Essentially, it's a valve that allows airflow in one direction while preventing it from flowing in the opposite direction. Think of it as a gatekeeper for your compres …

This short check valve video helps explain common symptoms of a bad check valve and how to test it.How to Test A Check ValveYour check valve is a one way valve that keeps air inside of your tank. It is NOT located on the side of your on/off pressure switch. It is hidden. If you follow the supply air line from your pump to your tank, you will find it. Most of it is in your tank.  Do this test first!! Let your unit pump up. Turn it off. Find the supply line from the pump to the …