How to Fix a Leaking Hose Under My Sink

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Fix a leaking hose under your sink.
Fix a leaking hose under your sink. (Image: Jupiterimages/Creatas/Getty Images)

If you notice water dripping from beneath your sink, you could potentially have a big problem on your hands. The water supply hose beneath your sink connects the water supply valve to the faucet above. A leak in the hose or a misconnected coupling could be the source of dripping water. Before you call the plumber, there are a few steps you can try yourself to fix a leaking hose under your sink. Not only will you gain experience by doing it yourself, you could save a little money, too.

Things You'll Need

  • Rag
  • Pliers
  • Adjustable wrench
  • Hose gasket
  • Plumber's tape
  • Hose repair tape

Clean out the space below the sink that contains the leaking hose. If the sink is mounted above a cabinet, open up the doors and remove any objects that may be in the way.

Look for the water supply hose connected to the sink that contains the leak. Make a note of the location in the hose where the leak is coming from. Follow this hose into the wall or floor where it connects to the water shut-off valve. Grasp the round or oval handle on the end of the knob and rotate it clockwise to cut the water supply.

Dry off the hose with the towel. Mop up any water that may be below the sink.

Unscrew the coupling at the end of the hose with either a pair of pliers or wrench, if this is where the leak is coming from. Examine the rubber washer inside and replace if needed. Wrap the threads on the coupling connection with plumber's tape. Reconnect the hose coupling and tighten.

Wrap the hose with repair tape, if this leak is coming from the middle of the hose. Start a couple of inches above the leak. Continue wrapping the tape around the hose in a clockwise fashion. Once you're past the leak, repeat the procedure in the opposite direction.

Turn the water supply back on by rotating the valve counterclockwise.

Check the hose for leaks.

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