How to Replace a Drain Valve on an Air Compressor

Posted on: September 19, 2022

how to replace a drain valve

If your compressor has leaking seals and is becoming problematic, it’s time to address the issue. Although many compressors have different designs, most models have similar components and characteristics. When you need high-quality parts and installation advice you can trust, Quincy Compressor is your most reliable source.

Condensation can accumulate inside your rotary screw or reciprocating air compressor as you use it. The vapor then condenses into liquid and falls to the bottom of the air tank. The drain valve lets you remove the excess moisture and depressurize the tank for easy servicing.

Rust or corrosion can often hinder the valve from sealing properly and prevent the tank from holding the correct amount of pressure. If your air compressor’s drain valve broke off or will not open properly, it can cause unhealthy moisture and rust to build inside the tank, so it’s vital to fix it immediately.

What You Need to Get Started

While the valve replacement does not require any specialized tools unique to the job, you will need the following items:

  • The new valve
  • A hand wrench or a socket
  • A brush or cloth to clean the rust or dirt from the threads
  • Safety glasses

The process does not require sealant because the new valve will come with it already applied.

The Replacement Process

One of the first rules of air compressor servicing is depressurizing the tank. You can accomplish this by opening the drain valve and waiting for all the air to escape.

Removing the Old Drain Valve

Removing the old valve involves the following steps:

  1. Unplug the compressor.
  2. Move the compressor on its side to expose the valve.
  3. Turn the wrench counterclockwise to loosen and detach the valve.
  4. Remove any debris from the valve threads.

Installing the New Drain Valve

With the parts prepared, install the new valve:

  1. Use your fingers to thread the new valve into the tank by turning it clockwise.
  2. Use the wrench to tighten and secure the valve.

Shop Air Compressor Parts at Quincy Compressor

Knowing how to fix the drain valve on an air compressor provides significant cost savings over a service visit or a trip to your repair shop. By maintaining your drain valve and replacing it when it becomes worn, you ensure peak performance for your compressor while preventing any long-term damage from occurring down the road.

If you need additional assistance with your valve replacement, Quincy Compressor’s professional and knowledgeable air experts can help. Contact us online today with any questions or to obtain product information. We also offer various maintenance and service plans to increase your air compressor’s performance and reliability.