DIY guideSink valves

Look under the sinks and at the supply lines for leaks

Check under each sink with a flashlight and a dry paper towel, so a slow drip is found before it rots the cabinet.

6 steps

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Start at one sink. Take everything out from under it so you can see the back wall and the floor.
Shine a flashlight on both shutoff valves and the nuts where the lines screw on. White or green crust, rust or a drop means a slow leak.
Run a dry paper towel along each line, from the valve up to the faucet. A damp spot shows a leak you can't see. Look for bulges, kinks or frayed braid too.
Run the tap for a minute, then wipe under the trap and each joint. A damp towel means the drain is leaking.
Press the cabinet floor and look at it closely. Soft, swollen or stained wood means water has been getting in for a while.
Turn that sink's valves clockwise until they stop, put a towel down, and ask Handyman for a plumber.
Turn the valves by hand. Forcing an old one can crack it.

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