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How to Fix a Crack in a Copper Water Pipe

Published in Pipe Repair 3 mins read

Fixing a crack in a copper water pipe often involves applying a temporary sealing material, such as copper repair epoxy putty, to stop the leak.

Using Copper Repair Epoxy Putty

One common and accessible method for addressing a crack in a copper pipe is using copper repair epoxy putty. This material is designed to create a seal over the damaged area.

What is Copper Repair Epoxy Putty?

According to one reference, Copper repair epoxy putties provide one of the easiest ways to fix a leaking pipe. Epoxy putties consist of two components, a resin and a hardener. When mixed together, these components form a material that can be used to plug holes before setting into a hardened material. This makes them suitable for sealing cracks or small holes in pipes.

Steps for Fixing a Crack with Epoxy Putty

While the reference highlights the ease and composition of the putty, the general process involves several steps to ensure a proper seal:

  1. Shut Off the Water Supply: Locate the main water valve or the valve controlling the section of pipe and turn off the water completely.
  2. Drain the Pipe: Open a faucet connected to the pipe at a lower level to drain any remaining water. The area around the crack must be dry for the epoxy to bond correctly.
  3. Clean and Prepare the Area: Use sandpaper or an emery cloth to clean the area around the crack. Remove any dirt, corrosion, or oxidation to create a clean surface for the epoxy to adhere to.
  4. Mix the Epoxy Putty: Following the product instructions, cut off the required amount of putty and mix the resin and hardener components by kneading them together. The putty will typically change color as it is properly mixed.
  5. Apply the Putty: Press the mixed epoxy putty firmly over the crack. Ensure it covers the entire damaged area and extends slightly beyond it. Mold it tightly around the pipe.
  6. Allow to Cure: Give the epoxy the recommended amount of time to harden completely. Curing times vary depending on the product and environmental conditions (temperature). Do not turn the water back on until the putty is fully cured.

Considerations

While epoxy putty is a convenient solution for temporary fixes, it's important to consider that:

  • Epoxy repairs are often considered temporary solutions, especially on pressurized water lines.
  • The long-term reliability of an epoxy fix depends on the size and nature of the crack, the water pressure, and the quality of the application.
  • For a permanent repair, professional plumbing services are usually required, which may involve soldering or replacing the damaged section of pipe.

Using copper repair epoxy putty can provide a quick way to stop a leak from a crack, buying you time until a more permanent repair can be made.

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