DIY guideSink valves

Water under the sink: find where it's coming from

Empty the cabinet, dry everything, then check each line and pipe one at a time until you see where the water starts.

7 steps

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Take everything out from under the sink and set a towel or a shallow pan on the cabinet floor.
Water near an outlet or a disposal's cord? Don't touch it: switch that circuit off first.
Wipe the valves, the supply lines, the drain pipes and the cabinet floor completely dry.
Run a dry tissue over each valve and up each line to the faucet. A wet tissue shows the leak, even with the taps off.
Fill the sink a little, pull the plug, and watch the trap and the drain pipe as it empties. Drops at a joint mean the drain.
If a dishwasher drains into this sink, run it and watch its hose where it joins the drain.
For a supply leak, turn both valves clockwise until they stop. A drain leak stops when nobody uses the sink.
Turn them by hand. Forcing an old valve can crack it.
Water still coming with the valves closed, a cracked pipe, or a leak from the faucet itself: ask Handyman for a plumber.

Handyman says: Valves shut. I'll find a plumber.

Free for every home. Handyman asks a few questions, then books a pro it trusts.