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.