How to Install PEX Pipe: A Comprehensive Guide

How To Install Pex Pipe

As a homeowner, you may have heard of PEX pipe and its benefits. PEX stands for cross-linked polyethylene, a type of flexible plastic tubing used for water supply lines. This type of pipe has become increasingly popular due to its durability, ease of installation, and affordability. In this article, we will guide you through the process of installing PEX pipe, step by step.

Introduction to PEX Pipe

A plumber demonstrates the proper technique for crimping PEX pipe connectors.
A plumber demonstrates the proper technique for crimping PEX pipe connectors.

PEX pipe is a type of plastic tubing that is used for water supply lines in homes and buildings. It is made from high-density polyethylene and cross-linked with other chemicals to make it strong and durable. PEX pipe has several advantages over traditional copper or PVC pipes. It is flexible, resistant to corrosion, and can withstand extreme temperatures and pressure.

Advantages of Using PEX Pipe

PEX pipe has several benefits that make it an ideal choice for water supply lines. Here are some advantages of using PEX pipe:


PEX pipe is highly durable and can last for up to 50 years. It is resistant to corrosion, cracking, and freezing, making it an ideal choice for areas with extreme weather conditions.

Easy Installation

PEX pipe is easy to install, even for DIY enthusiasts. It requires fewer fittings and connectors than traditional pipes, which means fewer chances of leaks. The flexible tubing can also be bent and curved, making it easier to navigate tight spaces and corners.


PEX pipe is more affordable than traditional copper pipes. It is also easier and quicker to install, which can save you money on labor costs.


PEX pipe is safe for drinking water and does not leach harmful chemicals into the water supply. It is also resistant to bacterial growth, which can reduce the risk of contamination.


Before installing PEX pipe, it is important to prepare the area and gather the necessary tools and materials. Here are the steps to follow:

Turn off Water Supply

The first step is to turn off the water supply to the area where you will be installing the PEX pipe. This will prevent water from flowing into the pipes and causing a mess during installation.

Drain Water from Pipes

Next, you will need to drain the water from the existing pipes. This can be done by opening the faucets and letting the water run until it stops flowing. This will ensure that there is no water left in the pipes, which can cause leaks during installation.

Remove Old Pipes if Necessary

If you are replacing old pipes with PEX pipe, you will need to remove the old pipes first. This can be a time-consuming process, but it is necessary to ensure that the new pipes fit properly and function correctly.

Inspect and Clean the Area

Before installing the PEX pipe, inspect the area to ensure that it is clean and free of debris. This will ensure that the pipes fit snugly and securely. It is also important to check for any obstructions or obstacles that may interfere with the installation.

Installation Process

Once you have prepared the area and gathered the necessary tools and materials, you can begin the installation process. Here are the steps to follow:

Measure and Cut PEX Pipe

Measure the length of the PEX pipe that you will need and cut it to size using a PEX tubing cutter. Make sure to leave a little bit of extra length so that the pipe can be properly inserted into the fittings.

Install Fittings and Connectors

Next, install the fittings and connectors onto the ends of the PEX pipe. These fittings and connectors will connect the PEX pipe to the supply lines and other pipes. Use a crimping tool to securely attach the fittings and connectors to the PEX pipe.

Connect to Supply Lines

Once the fittings and connectors are installed, connect the PEX pipe to the supply lines. Use a wrench to tighten the connections and ensure that they are secure.

Test for Leaks

Finally, turn on the water supply and check for leaks. If there are any leaks, turn off the water and tighten the connections until the leaks stop. Once you have confirmed that there are no leaks, the installation process is complete.

Tips and Best Practices

Installing PEX pipe requires some technical knowledge and skill. Here are some tips and best practices to help you install PEX pipe correctly:

Use Proper Techniques for Cutting and Crimping

When cutting PEX pipe, use a sharp tubing cutter or a saw designed for plastic. Don’t use a regular saw or scissors, as they can deform or damage the pipe. When crimping the fittings, use the right tool and follow the manufacturer’s instructions. Improper crimping can cause leaks and damage the pipe.

Follow Manufacturer Instructions

Each PEX manufacturer has specific guidelines for installing their product. Make sure to follow these instructions carefully to avoid any issues. Pay attention to recommended pipe sizes, crimping techniques, and installation methods. Following the manufacturer’s instructions can ensure a successful installation and prevent voiding the warranty.

Consider Hiring a Professional for Complex Installations

While PEX pipe installation is relatively straightforward, some installations may be more complex. If you’re not confident in your abilities or have a complex installation, consider hiring a professional plumber. A professional plumber will have the necessary experience and tools to ensure a safe and efficient installation.

Importance of Code Compliance

It’s essential to follow local building codes and regulations when installing PEX pipe. Failure to comply with local codes can result in fines or even the need to redo the installation. Make sure to research local codes and regulations before starting your installation.


In conclusion, PEX pipe is an excellent option for water supply lines due to its flexibility, durability, and affordability. However, proper installation is crucial for safety and efficiency. Use the tips and best practices outlined in this article to ensure a successful installation. Remember to follow the manufacturer’s instructions, use the right tools, and comply with local codes and regulations. If you’re not comfortable with the installation process, consider hiring a professional plumber. With the right knowledge and preparation, you can install PEX pipe with confidence and enjoy its benefits for years to come.

Dayne Williamson

I'm Dayne Williamson, and I love all things technology and finance. I started Napo News Online as a way to keep people up-to-date on the latest news in those industries, and I've loved every minute of it. I'm always looking for new ways to improve my site and help my readers, and I can't wait to see what the future holds.

Related Posts

© 2023 Napo News Online - WordPress Theme by WPEnjoy