ThePipingMart Blog Metals How to Fix a Pinhole Leak in a Copper Pipe

How to Fix a Pinhole Leak in a Copper Pipe

How to Fix a Pinhole Leak in a Copper Pipe

Have you ever had an issue with a pinhole leak in your copper pipe? It can be frustrating, but the good news is that it’s usually a relatively simple fix. Here’s what you need to know about how to fix a pinhole leak in a copper pipe.

The first step is to identify where the leak is coming from. If the pipe is visible, it should be easy enough to spot any wet areas or dripping water. You may also want to check for corrosion or discoloration of the pipe near where the leak is appearing. Once you have identified the source of the leak, you can begin making repairs.

The most common way to stop a pinhole leak in a copper pipe is by using an epoxy putty. This type of putty comes in two parts—a resin and hardener—that are mixed together until they form a soft clay-like material that can be applied directly onto the leaking area of the pipe. Once it has been applied, the epoxy will harden over time and form an airtight seal that will effectively stop any further leakage.

If the pinhole is too large for an epoxy putty to seal, then you may need to replace that section of piping entirely. This process involves cutting out the damaged section and replacing it with a new piece of piping using compression fittings and solder flux. This method requires more tools and materials than simply using epoxy putty, so make sure you are prepared before starting this job.

Shut off the water supply.

The first step in fixing a pinhole leak in a copper pipe is to shut off the water supply. This will prevent any further damage from occurring and will give you a chance to make the necessary repairs.

Locate the leak.

Once the water supply has been shut off, you will need to locate the leak. This can be done by looking for wet spots on the pipe or by listening for the sound of dripping water.

Clean the area around the leak.

Once you have located the leak, you will need to clean the area around it. This will help to ensure that the repair is properly sealed and will also prevent any dirt or debris from getting into the repair area.

Apply a patch to the leaky area.

There are a variety of patches that can be used to fix a pinhole leak in a copper pipe. The type of patch that you use will depend on the size and location of the leak.

Secure the patch in place.

Once you have applied the patch, you will need to secure it in place. This can be done by wrapping it with tape or by using clamps.

Turn on the water supply and check for leaks.

Once you have finished making all of the necessary repairs, you can turn on the water supply and check for leaks


Repairs for pinhole leaks in copper piping range from simple fixes like applying epoxy putty all the way up to replacing entire sections of piping if needed. Either way, this type of repair can easily be done by most homeowners without having to call for professional assistance—as long as proper safety precautions are taken, such as turning off water flow before beginning work on any plumbing project. So don’t let those pesky pinholes stand in your way; get out there and start fixing them!

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