How To Install PEX Compression Fitting?

PEX Compression Fitting

PEX compression fittings are essential for joining PEX tubing without the need for soldering. Here’s how to install them effectively.

Understanding PEX Compression Fittings

PEX compression fitting consist of a brass body and a compression ring. They create a secure seal by compressing the ring around the PEX tubing.

Tools and Materials Needed

Gather PEX tubing, compression fittings, a tubing cutter, and an adjustable wrench. Ensure the tubing matches the fitting size for a proper seal.

Step-by-Step Installation Process

1.Prepare the PEX Tubing

Cut the PEX tubing cleanly and squarely using a tubing cutter. Ensure there are no burrs or debris inside the tubing ends.

2.Insert the Compression Ring

Slide the compression ring onto the PEX tubing. Ensure it’s positioned about half an inch from the tubing end.

3.Insert the Fitting

Insert the PEX tubing into the compression fitting until it reaches the tube stop.

4.Tighten the Nut

Hand-tighten the compression nut onto the fitting threads. Use an adjustable wrench to make a quarter turn to secure the connection.

5.Check for Leaks

Turn on the water supply and check for any leaks around the fitting. If leaks are present, tighten the nut slightly until the leaks stop.

Advantages of Using PEX Compression Fittings

PEX compression fittings offer several advantages:

No Heat Required: They eliminate the need for torches or soldering tools.

Reusable: You can disassemble and reassemble them without damaging the fitting or tubing.

Versatility: Suitable for various PEX plumbing applications.

Tips for Successful Installation

Proper Tube Preparation: Always cut the PEX tubing squarely and remove any debris.

Hand-Tightening: Initially tighten the compression nut by hand to ensure proper alignment.

Leak Testing: Always check for leaks after installation to avoid potential water damage.


Installing PEX compression fittings is straightforward and efficient, making them ideal for DIY plumbing projects. By following these steps and tips, you can ensure a reliable and leak-free connection every time.

If you have read this article and have any questions, please feel free to contact IFAN. Below is our contact information:

Whatsapp:+86 13373827623
Email:[email protected]

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