Your Arizona Handyman Explains How to Determine the Source of A Faucet/Sink Leak

As a professional home repair expert and handyman, I have seen a lot of faucet leaks. Here is how to determine the source of a faucet/sink leak:

    1. Make sure the faucet handles are in the off position.
    2. Dry up any water around the faucet and under the sink.
    3. Do you observe any active water leaks?
    4. If you see active water leaking, the problem is between the under sink shut-off valve and the faucet.
    5.  Using a flashlight, check the shut-off valve, is water dripping from around the valve?  If so follow the water line attached to that valve up to the underside of the faucet connnection.  Is water running down the surface of the water line to the valve? 
    6. If so the connection may be corroded or the faucet is the problem.
    7. Check the connection to the faucet, is the connection tight? Shut off the associated water valve and disconnect the water line from the faucet. If the faucet connection and the water line connection look ok, apply teflon tape to the threads and re-connect tightly. Turn on the water valave, did the leak stop? If NO, proceed to step 16. 
    8. If the surface of the water line is dry, the problem is the shut-off valve or its connection.  To determine if the waterline connection to the valve is the problem, turn off the valve and disconnect the water line.  Dry off the valve, do new water leaks appear at the valve? If yes, see “Replacing an under sink shut-off valve”.
    9. If yes – Replace valve, if No – and the valve connection and the water line connection look ok, apply teflon tape to the threads and re-connect tightly. Turn on the water valve, did the leak stop? If NO, see “Replacing an under sink shut-off valve”.
    10. If the leaking stops you have resolved a problem, the water supply to the faucet is ok. Now, turn on the faucet. Inspect under the sink. Is everything dry? If Yes, you have found all the problems. If NO, there is still a problem with either the faucet or the drain lines.
    11. When you turn on the water, does water appear anywhere around the faucet or handles other than at the faucet spout?
    12. If yes – the faucet has a problem. Go to step 16.
    13. If not check the drain from the underside of the sink to the wall connection. Is there water on any of the drain pipes or pipe connections?
    14. If yes check and tighten each connection.  Dry off the piping and run more water.  If water appears at any connection, replace the washer seal at that connection.
    15. You have run all the checks above and have determined the faucet is the culprit.  Now you have several choices: 
    16. Try to repair the faucet – See “How to Repair a Faucet”.
    17. Replace the faucet – See “Replacing a Faucet”.
    18. Call Home Improvements and Repairs, LLC to repair/replace the faucet.