How to Mend a Pinhole Leak in Copper Pipe How to Mend a Pinhole Leak in Copper Pipe

What You'll Need
Epoxy pipe repair
Repair clamp

Fixing a pinhole leak in a copper pipe can be necessary from time to time. Pinhole leaks can create a lot of damage since they are difficult to detect and slowly leak. Fortunately fixing pinholes can be simple once you locate the leak.

Step 1 - Clean the Pipe

Once you located the leak you will need to cut the water off at the main and prepare the pipe. It needs to be cleaned and dried completely before you can fix the leak. A clean rag and a small amount of any gentle household cleaner will work.

Step 2 - Apply the Epoxy

Apply the epoxy to the pinhole and follow the manufacturers directions for cure time. In most cases an epoxy will require at least 4 hours to completely set. Be sure you are using an epoxy that is specifically designed for copper to avoid erosion.

Step 3 - Use the Clamp

A repair clamp is a tube that clamps on over a pipe. When used correctly this can repair a pinhole indefinitely. Place the clamp over the area you have epoxied, and adjust the screws to form a tight fit. You don't want to over tighten it as this can create a crack in the pipe.

Step 4 - Test

Make sure the leak is sealed by turning the water back on. If it's still leaking you may need to replace a portion of the pipe. This may require a professional if you don't have plumbing experience. 

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