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THE GUIDE / Kitchen & bath

What to do about a leak under the sink

Water under a sink can come from a supply line, a drain joint or the fixture above. A dry surface makes the source easier to spot.

What you can check

  1. 01

    Move stored items away and place a shallow container or towels beneath the drip.

  2. 02

    If safe and accessible, close the fixture shutoff valves gently. Do not force them if they are stiff or corroded.

  3. 03

    Dry the area and note whether the leak occurs when the faucet runs or even when it is off.

Safety first

If water is near outlets or appliances, keep clear of the wet area and arrange qualified electrical help. For a substantial leak, use the main shutoff if it is safely accessible.

When to ask for help

Request help if the leak persists, the shutoff is stuck, or the cabinet or wall remains damp.

Ask about this issue

General guidance only. Every home is different; stop if you are unsure or conditions are unsafe.