How to replace a leaky kitchen sink

Many things can leak at a kitchen sink. The faucet and drain can leak, or the spray hose can break. If you have determined that these are not sources of water under your sink, the only remaining cause is the leaky sink. The metal of some sinks is so thin that it wears down over time.

Remove the old sink

Remove items from under the sink to make it easier to get to the pipes. Turn the hot and cold water shut-off valves clockwise to close them. Turn on the faucet to allow water to flow out of the pipes. Disconnect the water lines from the valves using an adjustable wrench.

Disconnect the drain line that connects the old sink to the trap by turning the fittings counterclockwise and loosening and removing them with an adjustable wrench. Loosen and remove the sink basket as well.

Look under the countertop at the edge of the sink for clamps or screws that may be holding the sink in place. Remove the screws or move the clamps out of the way. Stand in front of the sink and put your hand in the drain hole.

Install the new sink

Install the faucet before you install the sink to make it easier to get to the fixtures. Slide the gasket that comes with the faucet installation kit around the holes on the bottom of the faucet. Alternatively, you can spread a bead of silicone sealant under the base of the faucet. Place the faucet and its base into the opening in the sink.

Secure the faucet to the sink using the washers and mounting nuts from the installation kit. Hand tighten the nuts from the underside of the sink. Use an adjustable wrench to final tighten the nuts. Wipe off any excess sealant that leaks from the underside of the faucet.

Wrap plumber’s tape around the threads of the water supply lines on the faucet. Attach the supply lines to the faucet. Tighten the connections by hand and then by a quarter turn with an adjustable wrench.

Attach the clips that hold the sink in place to the underside of the sink according to the manufacturer’s instructions. The clips are part of the sink installation package. Paint a bead of silicone sealant under the outer lip of the sink.

Attach the supply lines to the supply valves the same way you attached them to the sink. Be sure to connect the hot water line to the hot water valve. Turn on the water in the sink and check for leaks. If you notice water dripping from a connection, tighten the fitting only a quarter turn at a time until the leak stops.

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