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Project Guide

How to Fix a Leaky Pipe

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Epoxy Putty
A person turns a water supply valve beneath a sink.

An epoxy putty can be applied over the source of the leak to temporarily seal it.

  • Immediately turn off the water supply upstream of the leaking pipes.
  • Drain the water from the damaged line and ensure that the area to be patched is clean and dry so that the epoxy will properly adhere to the pipe.
  • Tear off enough plumbing epoxy putty to fully cover the surface around the leak.
  • Knead the putty until it is pliable enough for application.
  • Apply and cure the putty according to the manufacturer’s instructions.
  • After the putty has fully cured, turn on the water flow and check for leaks.
Pipe Repair Kit with Tape
A person uses a wrench to work on plumbing pipes beneath a sink.

Some pipe repair kits have a special tape used to provide emergency relief from leaks. 

  • Immediately shut off the water supply to the leaking pipes or fittings.
  • Following the manufacturer’s instructions, activate the fiberglass tape and wrap around the area of the leak.
  • Ease of application and flexibility of material make it useful to use around fittings.

A self-fusing silicone tape can be used as a temporary fix on low pressure lines. Wrap the tape around the pipe, stretching it as you make tight overlapping passes to cover the area of the leak.

Patch and Clamp
Plumbing pipes and a toolbox are shown beneath a sink.

Repair clamps can sometimes be used for larger splits or ruptures in pipes. 

  • Immediately turn off the water supply to the leaking pipes and clean the area around the hole to be patched.
  • Use a file to smooth any sharp edges that might cut through the neoprene rubber patch.
  • Apply the patch and repair clamp so it evenly overlaps the damaged section of pipe.
  • Tighten the clamps to seal the leak.
  • Turn on water supply and check for leaks.

When figuring out how to fix a leaking pipe, remember that repair tape, pipe putty & clamps offer temporary solutions to an immediate problem. Once pipe leaks are sealed, your next step is just as important: Make plans for a permanent repair even if it's a small leak and call a licensed plumber if necessary.

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