How to Replace Copper Pipes with PEX: A Step-by-Step Guide for DIYers and Pros

by Keira May 29, 2024

written by Keira May 29, 2024

How to Replace Copper Pipes with PEX: A Step-by-Step Guide

Understanding the Benefits of PEX Plumbing

Traditional copper pipes have been the standard in plumbing for decades, but PEX (cross-linked polyethylene) tubing is quickly becoming the preferred choice for both professional plumbers and DIY enthusiasts alike. PEX offers several advantages over copper, including:

Corrosion resistance: PEX is highly resistant to corrosion, unlike copper, which can develop pinhole leaks over time.
Flexibility: PEX is flexible and easy to work with, allowing for easier installation in tight spaces or around obstacles.
Lower cost: PEX is generally less expensive than copper, both in terms of material and labor costs.
Freeze resistance: PEX is more resistant to freezing temperatures than copper, reducing the risk of burst pipes in cold climates.

When to Consider Replacing Copper Pipes with PEX

If you’re experiencing issues with your copper pipes, such as leaks, corrosion, or reduced water pressure, it may be time to consider replacing them with PEX. Here are some signs that your copper pipes may need to be replaced:

Discolored or green-tinted water
Musty or stale odors coming from pipes or walls
Bulges or cracks in walls or ceilings
Pinhole leaks or slow drips

Step-by-Step Guide to Replacing Copper Pipes with PEX

Replacing copper pipes with PEX is a relatively straightforward process that can be completed in a few hours. Here’s a step-by-step guide to help you get started:

Turn off the water supply: Locate the main water shut-off valve and turn it off to prevent water from flowing through the pipes.
Drain the pipes: Open a faucet at the lowest point in your home to drain any remaining water from the pipes.
Cut the copper pipes: Use a copper tubing cutter to cut the copper pipes at the desired locations.
Smooth the cut ends: Use a copper deburring tool to remove any burrs or sharp edges from the cut ends of the copper pipes.
Measure and cut the PEX tubing: Measure and cut a length of PEX tubing long enough to replace the removed section of copper pipe, allowing for extra length for expansion and contraction.
Connect the PEX to the copper: Insert the cut ends of the PEX tubing into push-fit connectors and connect them to the copper pipes. Ensure that the connections are secure and fully seated.
Connect the fixture supply lines: If the removed section of copper pipe also fed fixture supply lines, connect those lines to the new section of PEX using push-fit tee-fittings.
Turn on the water supply: Slowly turn on the main water shut-off valve and check for any leaks.

Ensuring Electrical Grounding with PEX Pipes

Replacing metal plumbing pipes with PEX can disrupt the electrical grounding system in your home. This is because PEX is a non-conductive material. To ensure proper grounding, you may need to install a grounding rod or consult with an electrician.

When to Call a Professional

While replacing copper pipes with PEX is generally a DIY-friendly project, there are certain situations where it’s advisable to call a professional plumber:

If you’re not comfortable working with plumbing systems
If the copper pipes are embedded in concrete or other hard-to-reach areas
If you suspect there may be electrical grounding issues
If you’re replacing a large section of copper pipes or the entire plumbing system

Additional Tips for PEX Installation

Use push-fit connectors specifically designed for PEX tubing.
Ensure that all connections are secure and leak-free.
Use copper pipe straps to support vertical sections of PEX tubing.
Allow for expansion and contraction of PEX tubing by leaving some slack in the lines.

Keira

Keira is a seasoned gardener with a rich background in education and a passion for transforming even the smallest, most challenging spaces into lush, productive gardens. With over two decades of experience in both teaching and gardening, she brings a unique blend of skills and insights to Life Science Art, where she shares her expertise through engaging and informative articles. Keira's journey into gardening began in her early years, inspired by her grandmother's ability to coax vibrant blooms and hearty vegetables from the rocky soil of their family farm. This early exposure to the wonders of gardening planted a seed of curiosity and love for plants that has only grown over the years. Before fully immersing herself in the world of gardening, Keira spent many years as a special education teacher. This role honed her patience, creativity, and problem-solving skills—qualities that have proven invaluable in her gardening endeavors. Her teaching experience also gave her a deep understanding of the diverse needs and capabilities of individuals, which she now applies to helping others learn to garden effectively, regardless of their starting point. Keira specializes in small-space gardening, low-income gardening, and cultivating plants in poor soil conditions. She understands that not everyone has access to vast, fertile lands or unlimited resources, and she is dedicated to making gardening accessible and rewarding for everyone. Living in urban areas or having limited outdoor space shouldn't be a barrier to enjoying the benefits of gardening. Keira has mastered the art of maximizing every inch of available space, whether it's a tiny balcony, a cramped backyard, or a window sill. Her innovative techniques and creative solutions help her readers grow a variety of plants in the most confined spaces. Keira is also a strong advocate for low-income gardening. She believes that everyone should have the opportunity to grow their own food and enjoy the therapeutic benefits of gardening, regardless of their financial situation. Through her articles, she shares practical tips on budget-friendly gardening methods, repurposing household items, and making the most of available resources. Her advice empowers individuals and families to start and maintain gardens without breaking the bank. Not everyone is blessed with rich, loamy soil. Keira's expertise extends to growing plants in less-than-ideal soil conditions. She provides guidance on improving soil quality, selecting hardy plant varieties, and employing sustainable practices to ensure a bountiful harvest, even in challenging environments. Her hands-on experience and proven techniques help gardeners turn even the poorest soil into a thriving garden. Keira's contributions to Life Science Art are invaluable. Her articles cover a wide range of topics, from step-by-step guides on planting and maintaining specific types of gardens to tips on dealing with common gardening challenges. She also delves into the science behind plant growth, soil health, and sustainable gardening practices, making complex concepts accessible to readers of all backgrounds. Beyond her technical expertise, Keira's writing is infused with warmth and encouragement. She understands that gardening is not just about growing plants; it's about fostering a connection with nature, finding peace and fulfillment, and building a community. Her personal anecdotes and down-to-earth advice resonate with readers, inspiring them to embark on their own gardening journeys with confidence and joy. Keira invites you to join her on Life Science Art, where she shares her wealth of knowledge and passion for gardening. Whether you're a seasoned gardener or just starting out, her articles offer valuable insights, practical tips, and the inspiration you need to create your own green oasis. Discover the joys of gardening with Keira as your guide and unlock the potential of your outdoor space, no matter how small or challenging it may be.