9 Steps to Fix a Leak Under Kitchen Sink.

  1. Shut off the water supply to the sink. You will usually find the shut-off valves under the sink or nearby.
  2. Place a towel or a basin under the sink to catch any water that may be left in the pipes.
  3. Locate the source of the leak. This may require you to remove the sink trap or access the pipes from under the sink.
  4. Once you have found the source of the leak, assess the damage. If the leak is small and only involves a loose connection, you may be able to fix it by tightening the connection using a pipe wrench.
  5. If the leak is more significant, you may need to replace a section of the pipe or the sink trap. To do this, you will need to cut out the damaged section and install a new piece using plumbing tape and pipe connectors.
  6. Before installing the new piece, wrap the threads of the pipe connectors with plumbing tape to create a watertight seal.
  7. Connect the new piece of pipe or sink trap to the existing plumbing using the pipe connectors. Tighten the connections with a pipe wrench.
  8. Turn the water supply back on and test the sink to make sure the leak has been fixed.
  9. If the leak persists, you may need to call a professional plumber for further assistance.

Remember to always use caution when working with plumbing and only attempt repairs if you feel comfortable and competent. It is always best to call a professional plumber if you are unsure of how to fix a leak or