What to do if pipe under sink is leaking?
Andrew Henderson
Updated on April 05, 2026
What to do if pipe under sink is leaking?
If it’s the sink drain that’s leaking, unscrewing it and repacking it with plumber’s putty will usually fix the problem. Although you usually notice faucet leaks above the sink, sometimes water can flow down the back of the faucet and drip underneath the sink without being visible.
Where is my sink leaking?
Most kitchen sink leaks are on the drain lines (very frequently on loose or improperly connected slip joint connections). These won’t show themselves unless you’re running water. Start by running water in both of the sink basins.
How do you find a leak under the sink?
Fill the sink with water, then watch underneath as it drains. Look for leakage around the slip joints in the drain pipe. Hand-tightening the large joint nuts slightly may stop leakage. If that fails, drain pipes may need to be disassembled and new joint seals installed.
What to do if your kitchen sink is leaking?
You may see water dripping or spraying from a faucet connection, and if so, there’s your leak. If the faucet isn’t leaking, fill the sink with water, then let it drain and watch for water dripping from the P-trap assembly as the water flows.
How to fix a leaking bathroom sink supply connector?
If this does not solve the problem, remove the entire connector underneath the faucet, apply Teflon tape on the male threads of the faucet and handles, and reconnect it. Turn the water on to check if the problem is solved. If not, it is necessary to install a replacement. This is necessary especially if the threads are corroded or loose.
How to fix a tap ( faucet ) leaking under the sink?
How to fix pipework to a tap (faucet) leaking under the sink! If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.
How do you fix a water line leak?
Turn on the water supply and check if the leak is fixed. If it is not, turn the water supply off again and remove the water supply lines. Wipe the male threads on the connector with a dry cloth and apply 2 to 3 wraps of Teflon tape around them.
How do I fix a leak under my sink?
If it’s the sink drain that’s leaking, unscrewing it and repacking it with plumber’s putty will usually fix the problem. Although you usually notice faucet leaks above the sink, sometimes water can flow down the back of the faucet and drip underneath the sink without being visible.
How do I fix a leaking sink pipe?
Place the bucket underneath the leaky pipes. Put on your nitrile or vinyl gloves to protect your hands from contaminated drain water. Turn off the water valves to the sink to prevent use of the water when the sink drainpipes are removed.
Why is my sink faucet leaking?
Faulty installations are a common reason for leaking sinks. Usually, this is something as simple as a connector not being tightened properly, either where the water supply connects to the faucet itself or the seal within the faucet that keeps water from going anywhere but through to the tap.
What causes a leak under the sink?
Under-sink leaks can be caused by corroded, poorly insulated or clogged pipes. By the time you notice such a leak, it’s likely to have caused significant water damage in the cabinet beneath your sink.