Is Your Air Compressor Leaking? The Check Valve Might Be the Problem

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 prevent it from flowing back out. It's a simple device with a big responsibility.

The Warning Signs of a Failing Check Valve

A check valve doesn't just fail all at once. It can show subtle signs of wear that, if caught early, can save you from bigger problems. Look out for these symptoms:

• Continuous Leakage: The most obvious sign. If you hear a hissing sound coming from the pressure switch or the unloader valve after the pump shuts off, it's a strong indicator that the check valve isn't sealing properly.
• Motor Short Cycling: A faulty check valve can cause the pump to restart frequently, even if you haven't used any air. This is because the air is slowly leaking back out of the tank, causing the pressure switch to activate the pump unnecessarily.
• Overheating and Premature Motor Failure: When the pump has to constantly fight against a leaky check valve, it can overheat. This extra strain puts tremendous wear on the motor, leading to reduced lifespan and potential failure.

Why a Replacement is Your Best Bet

Attempting to repair a check valve is often a short-term fix. A full replacement is the most reliable way to ensure your system is working efficiently and safely. A new check valve will:

• Prevent Air Leaks: Stop pressure loss and ensure your tank holds air as it should.
• Extend Motor Life: Reduce short cycling and the strain on your compressor's motor.
• Improve Efficiency: Your compressor will no longer waste energy by constantly refilling a slowly leaking tank.

At Master Tool Repair, we offer high-quality replacement check valves for a wide range of air compressor brands. Our parts are designed to be a direct fit, getting your compressor back to peak performance. Don't let a small leak turn into a major repair.

Find the right check valve for your compressor at mastertoolrepair.com.

Learn more about check valves in some of our other blog posts: 

• What Is an Air Compressor Check Valve and How Does It Work?
• How To Replace an Air Compressor Check Valve
• Part of the Week: The Mighty Check Valve