How To Repair A Plumbing Leak

If you have a leak in your plumbing, such as in the drainpipe beneath your sink, you're going to want to repair this. A leaking drain can cause a lot of damage to the area beneath your sink and can leave a water stain that can be unsightly. If left to leak for too long, it can damage your floor beneath, or the leak can worsen into something much more expensive to repair. If you have a leak in your drainage pipe, you need to make the repair or call a plumber to have your pipe repaired for you. Read on for instructions to get the job done yourself.

What You'll Need For The Job:

  • PVC plumbing pipe
  • Plumber's putty
  • Pipe wrench
  • Rags
  • Bucket


  1. To start, you're going to need to take a look at the pipe that is leaking and inspect to see what pipe you're going to need to repair this issue. If the pipe is leaking in the P-trap for instance, you'll need this part for the repair. If it's leaking in a different part of the drainpipe, you'll need that part for the repair. You're also going to need to take a close look at the size of your pipes and be sure you are purchasing properly sized pipes for the repair.
  2. Next, turn the water off to the sink where you are working. The shut-off is usually located beneath the sink, or you may have a shut-off nearby. Either way, turn the water off to prevent water from getting turned on and getting all over you as you are working.
  3. Use your pipe wrench to begin removing the section of the pipe that needs to be repaired. Place a bucket beneath the pipe opening and rags to help clean up the water that may leak out.
  4. Once the pipe is removed, take the new pipe and replace it where the old one once was. If you need to, you may need to cut the pipe down in order to fit. A hand saw can cut through PVC. Use a file to sand down the rough edges.
  5. Fit the pipe section into place and apply plumber's putty to the fitting so it holds tightly and creates a seal. 
  6. Finally, turn the water back on and test your work. Run the water just a little bit at a time through the drain to be sure it isn't leaking anywhere around the fitting or the pipe you just replaced.

If you have a leaky drainpipe, you need to have it repaired before it causes a lot of damage to your home that can be costly to repair. Hire a professional plumbing contractor to make this repair for you if you aren't comfortable making this repair on your own.