How To Clamp Pex: A Step-By-Step Guide

PEX Plumbing Pipe Everything You Need to Know Family Handyman
PEX Plumbing Pipe Everything You Need to Know Family Handyman from


PEX, or cross-linked polyethylene, is a popular material used for plumbing systems due to its flexibility, durability, and ease of installation. One essential step in installing PEX pipes is clamping them securely to ensure a leak-free connection. In this article, we will guide you through the process of properly clamping PEX pipes for your plumbing project.

What You Will Need

Before you begin, gather the following tools and materials:

1. PEX Tubing

Purchase PEX tubing that is suitable for your specific plumbing needs. Measure and cut the tubing to the desired length using a PEX cutter.

2. PEX Clamps

Choose the appropriate size of PEX clamps for the diameter of your PEX tubing. Stainless steel clamps are commonly used and ensure a secure connection.

3. PEX Crimp Tool

A PEX crimp tool is necessary for properly securing the clamps onto the PEX tubing. Ensure you have a tool that matches the size of the clamps you are using.

4. Safety Gear

Wear safety goggles and gloves to protect yourself during the installation process.

Step-by-Step Guide

Step 1: Prepare the PEX Tubing

Make sure the ends of the PEX tubing are clean and free from any debris. Use a PEX deburring tool to remove any sharp edges or burrs that may affect the connection.

Step 2: Insert the PEX Clamp

Slide the PEX clamp onto the tubing, ensuring it is positioned approximately 1/8 inch from the end.

Step 3: Insert the PEX Fitting

Insert the PEX fitting into the end of the tubing until it reaches the shoulder of the fitting. Ensure it is fully inserted and seated properly.

Step 4: Position the PEX Crimp Tool

Place the jaws of the PEX crimp tool over the PEX clamp, ensuring it is centered and aligned correctly.

Step 5: Crimp the PEX Clamp

Squeeze the handles of the PEX crimp tool firmly to compress the clamp onto the PEX tubing and fitting. Apply enough pressure to create a secure connection, but avoid over-crimping, which can damage the clamp or tubing.

Step 6: Check the Connection

Inspect the crimped connection to ensure it is tight and secure. Verify that the clamp is evenly compressed around the tubing and fitting.

Step 7: Repeat for Additional Connections

If you have more connections to make, repeat steps 2 to 6 for each one. Take your time and ensure each connection is properly clamped.

Step 8: Test for Leaks

Once all connections are made, turn on the water supply and check for any leaks. Monitor the system for a period of time to ensure there are no issues.


Clamping PEX pipes is a crucial step in any plumbing project to ensure a secure and leak-free connection. By following this step-by-step guide, you can confidently clamp PEX tubing with the right tools and techniques. Remember to take your time, double-check each connection, and test for leaks before considering the job complete. With proper clamping, you can enjoy the benefits of PEX plumbing for years to come.