The short answer
Assess the Leak First
Before you touch the pipe, find the water shutoff valve and turn it off. Open a faucet at the lowest point in your home to drain the line. A pinhole leak often sprays a fine mist, so confirm the exact spot by wiping the pipe dry and watching where the water appears.
Check the pipe for corrosion or greenish stains, which point to pinhole leaks. If the pipe is in a wall, floor, or other tight spot, you may not be able to reach it safely. In that case, you can stop the leak temporarily, but plan to have a plumber do a permanent repair.
Temporary Fix Options
A repair clamp is the most common temporary fix. You place a rubber gasket over the hole and tighten a metal band around the pipe. This stops the leak quickly and can hold for months, but it is not a permanent solution.
Epoxy putty is another option. Clean and dry the pipe, then press the putty over the hole and let it cure. It works well for small pinholes, but it may not hold if the pipe is under high pressure. Both fixes require the pipe to be dry and clean of oil or dirt.
- Turn off the water and drain the line before starting
- Sand the pipe lightly with fine grit to help the patch stick
- Apply the clamp or putty over the hole, not beside it
- Let epoxy putty cure for the time stated on the label
- Check the patch for drips after you turn the water back on
Permanent Repair Options
For a permanent fix, you can solder a coupling over the pinhole. This requires a propane torch, flux, and solder. Cut out the damaged section, clean the pipe ends, and solder in a new piece. This is a skill that takes practice.
If you are not comfortable soldering, you can use a compression coupling. Slide it over the pipe and tighten the nuts to seal the leak. Compression fittings are easier for a homeowner but still need clean, round pipe. If the pipe is corroded or misshapen, call a plumber.
When to Call the Pros
If the pinhole is in an inaccessible spot, like inside a wall or under a slab, call a plumber. Corroded pipes may have multiple weak points, so a single patch might not stop the problem. A plumber can inspect the pipe and suggest a long-term fix.
After the pipe is repaired, check for water damage in the surrounding area. If the leak has soaked drywall, wood, or insulation, you may need water damage cleanup. Local water damage pros can dry out the structure and prevent mold growth.
Prevent Future Pinholes
Pinhole leaks often come from water chemistry that corrodes copper from the inside. You cannot always control this, but you can reduce the risk. Keep the water pressure within normal range and avoid abrasive pipe cleaners.
Inspect exposed pipes regularly for green spots or small drips. If you have hard water or acidic water, a water softener or neutralizer may help. If you live in Layton, keep your shutoff valve location written down so you can act fast in an emergency.
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Call Now (801) 383-0232Frequently asked questions
How long does a repair clamp last?
A repair clamp can last from a few months to a few years, depending on water pressure and pipe condition. It is a temporary fix, so check it often for drips. For a permanent solution, solder or replace the pipe section.
Can I use duct tape to stop a pinhole leak?
Duct tape is not a reliable fix for a pressurized water leak. It can stop a drip for a short time, but it will likely fail. Use a repair clamp or epoxy putty, which are designed for the job.
What causes pinhole leaks in copper pipes?
Pinhole leaks are usually caused by corrosion from water chemistry, such as high acidity or high oxygen content. They can also come from turbulent water flow that wears away the pipe. If you see multiple leaks, consider replacing the pipe.