How Do You Fix a Hole in PEX Tubing?

Leaky plumbing is big stress, but you can’t always wait for a plumber to come and fix it for you, can you? Do-it-yourself culture gives you more self-sufficiency in your own home and that always feels good.

The plumbing in many houses consists of PEX (cross-linked polyethylene) tubing. Now, imagine finding the tubing leaking and you can’t get hold of a plumber fast enough. Well, you have got to buckle up and do the job yourself, right?

You don’t know where to start? We’ve got you covered on that, don’t you worry. Read on for the procedure – and make sure you have each of the mentioned tools.

Method One

Materials You Need:

-PEX tubing

-PEX crimp tool of appropriate size

-PEX cutter

-PEX fitting(s) crimp style

-PEX crimp rings of appropriate size

-Go/no-go gauge

-Measuring tape


1. Use PEX tubing cutter to cut out the leaky area of the PEX tubing

2. Get a new piece of PEX tubing which is of slightly greater size than the length you require for the repair.

3. Use a crimp connection method to attach the tubing to fittings.

4. Use the go/no-go gauge to verify that the connection is secure.

Method Two

Step 1: Check the PEX brand and buy corresponding repair coupling

The first step is to find out which PEX brand was used when the plumbing in the house was being installed. Knowing the brand means you know the right repair coupling to buy for the problem. Buy appropriate coupling barb and crimp rings.

If you don’t have crimping tools, you should also buy or rent them. You need crimping tools because the couplers will cause the finish floor level to rise – crimping enables you to adjust to appropriate levels for smooth water flow.

Step 2: Re-inspect the leakage

Take another look at the PEX leakage. This time use a soap solution – spraying the solution into each joint to see which ones create small bubbles. The ones that create bubbles have the leakage.

Step 3: Repair leak

For this task you will need stainless steel clamps and insert fittings.

Use a PEX pipe cutter to cut open the joint. Insert fittings and rejoin using screws and clamps.

Insert fittings may be plastic or brass. You can get them at a hardware store or a local farm store in your area. Note: plastic fittings are not as durable as brass fittings.

Step 4: Crimp the PEX tubing

After repairing the leak, you now have to restore the PEX tubing to its right shape.

One of the consequences of the repair is uneven water level and that can have an adverse effect on the entire plumbing of the house. Fixing that problem requires pipe cutter, PEX crimp tool, and PEX de-crimping tool.

Start this process by creating a joint – use a PEX pipe cutter to cut into the tubing. You then put crimp rings into position over the ends of the tubing, insert the fittings into the tube.

After that, push the crimp ring to the edge and pull the crimp handles apart, opening them so as to position the crimp rings and then force the rings to tighten

How to Avoid Leaks During PEX Installation

1. Do a pressure test and monitoring of the system. Note that it there is a leak anywhere in the system, you will get a lower reading from the temperature gauge than you got initially.

2. For a crimp connection system, a go/no-go gauge is necessary to verify the PEX connections are secure.

3. Consult the manufacturer’s manual in case of any tips and installation requirements regarding freeze protection and freeze prevention.


There you have it. If your PEX tubing has a hole, the above are the things you can do. We have also given you some tips on what you can do to avoid leaks in PEX tubing during installation.

Follow these tips and you might not need to call in the plumber after all. If you don’t have any of the mentioned tools, you can get them at your local hardware store or even rent them.

If you don’t succeed, though, you can always call the plumber – and watch closely what he does, so you don’t have to call him next time!

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