To seal a copper pipe leak, turn off the water, cut out the damaged section and replace with a repair sleeve. Solder the repair sleeve into place with a torch flame and solder wire.Continue Reading
To seal a leak on a copper pipe:
Turn off the water at the main supply valve and drain the pipes before repair.
Use a pipe cutter and cut out the damaged section.
Use a wire fitting brush to clean the interior of the sleeve, and use emery paper to clean the exterior of the pipe. Then brush flux onto the areas.
Slide the replacement collar over the cut sections of pipe.
Use a torch flame and solder wire to solder the collar into place.