How to cut PEX pipes.

Before you start cutting PEX pipes...

Before you put on your work gloves, it's essential to consider a few crucial factors:

Local codes and regulations. Familiarize yourself with local building codes and regulations regarding PEX installation. Staying compliant ensures not just a successful project — but also a safe one.

According to the Plastic Pipe and Fittings Association, "The user must determine which codes are applicable to his/her specific project, and also must ensure compliance with all local, state, and federal codes, regulations, and standards. Codes are constantly reviewed and updated."

Pipe sizing. Accurate measurement is key. Ensure you know the pipe size required for your project to avoid installation complications.

Compatibility. Verify that all fittings, tools, and accessories are compatible with PEX material. Using the right components ensures a reliable and leak-free plumbing system.

With these considerations in mind, gather the necessary supplies, tools, and equipment before you get started.

What you'll need:

• Deburring tool
• Marker or pencil
• Measuring tape
• PEX pipe
• PEX tubing cutter
• Clamps
• Safety glasses
• Work gloves

Now, let's get to the DIY process.

Step 1: Straighten, measure, and mark.

First, straighten out the PEX tubing as much as you possibly can without damaging it. Then, get ready to measure twice and cut once.

Use a measuring tape to determine the length needed. Double-check your measurements before marking, and add about 1 inch. Adding an inch adds more flexibility for the pipe to expand and contract. Mark the cutting points on the PEX pipe using a marker or pencil.

Step 2: Secure the pipe.

To ensure a clean and precise cut, secure the PEX pipe in place using clamps or a stable work surface. Stability is key to achieving a professional finish.

Step 3: Cut using a PEX tubing cutter.

If your project is big and you plan on doing lots of DIY with PEX piping, it's worth investing in a quality PEX tubing cutter. Follow the manufacturer's guidelines, place the cutter over the marked point, and make a clean cut.

Pro tip: If you don't want to buy a PEX tubing cutter, you can use a utility knife or ratchet cutter instead. It might not give you as clean a cut, but it will get the job done.

Step 4: Deburr the edges.

After the cut, use a deburring tool to remove any rough edges. This step is critical for preventing damage to fittings, allowing the pipe to more easily attach to the fitting, and ensuring an overall secure connection. Smooth edges can help ensure proper fitting connections and reduce the risk of leaks.

Mistakes to avoid when cutting PEX pipe.

Save yourself from headaches and costly repairs down the line. Here are two common mistakes to avoid when cutting a PEX pipe.

Mistake #1: Using the wrong tools.

Stick to tools designed for PEX cutting to ensure a smooth process. Again, you could use a utility knife or ratchet cutter. However, you might not get as clean a cut as you would with a PEX tubing cutter.

Mistake #2: Skipping the deburring step. 

Neglecting to complete the step of deburring the pipes will not do you any favors. Take the time to deburr each cut end for a polished, professional finish.

Don’t want to DIY? Hire a plumber instead.

Embarking on a DIY journey is empowering, and cutting PEX pipe is well within the capabilities of many homeowners. However, plumbing can be intricate, and mistakes can lead to costly repairs.

If you're unsure whether you can get the job done right or the project seems daunting, hiring a professional plumber is a good idea.

Get the ball rolling by downloading the Thumbtack app. See a list of top-rated plumbers near you, read their customer reviews, check out photos of past projects they've completed, and start getting free estimates today.

FAQs.

Can I cut PEX with a copper pipe cutter?

You may be able to use a copper pipe cutter to cut PEX pipes. However, it's highly recommended that you stick with tools that are specifically designed for PEX pipe cutting.

Are PEX pipes more resistant to freezing than copper pipes?

Yes, PEX pipes are more resistant to freezing. That's because they're able to expand and contract, reducing the risk of bursting.

However, you should not use PEX pipes in above-ground outdoor applications. According to the Plastic Pipe and Fittings Association, "Short exposures to sunlight or UV during construction are permissible, but should not exceed the manufacturer's recommendations. PEX should be stored under cover, shielded from direct sunlight or other UV exposure."

Can PEX pipes be used for both hot and cold water applications?

Yes, PEX pipes are versatile and suitable for both hot and cold water applications.

Do PEX plumbing systems require fewer fittings than traditional alternatives?

Yes, PEX plumbing systems typically require fewer fittings due to the pipes' flexibility. This can help simplify installations and reduce potential points of failure.