The water flow in a single-lever faucet is controlled by the maneuvering of a small ball that is located within a socket. The two places that water is likely to drip on this type of faucet are from the faucet spout, and from around the base of the handle. To perform the repair for either leak, you will need to first remove the faucet handle. All the replacement parts that are needed will be included in a repair kit, available from a hardware or home improvement store.
Instructions
1. Determine where on the faucet that the drip is coming from, whether from the faucet spout or from around the handle. Turn off the water to the sink, from beneath the sink, by turning the shut-off valves completely clockwise.
2. Raise the faucet handle all the way up, in the center position, to eliminate any water pressure. Confirm that both the hot and cold water valves are off. Cover the open sink drain with a rag.
3. Pop off the small, decorative cover beneath the raised handle. Insert the Allen wrench into the exposed Allen handle screw, and turn the screw counter-clockwise. Lift and remove the handle, exposing the cap with adjusting ring. Wrap tape around the jaws of a pair of slip-joint pliers. Slightly screw the domed cap clockwise with the pliers, tightening the cap. Do this if the faucet is leaking from around the handle base.
4. Unscrew the cap, turning the cap counter-clockwise with the pliers, if the faucet is leaking from the spout. Lift out the white, plastic cam and the black packing. Lift out and inspect the stainless steel ball. Replace a ball that is worn or cracked. Remove the two rubber seats and the springs underneath, using a screwdriver. Insert new springs, and press new rubber seats atop the springs in the holes within the faucet spout.
5. Align the groove in the ball with the pin in the socket and drop the ball in. Install the packing atop the ball. Align the tab on the cam with the notch on the valve body, and place the cam on top of the packing. Thread on the cap with the adjusting ring by hand. Tighten the cap clockwise, using the pliers. Install the handle onto the cap. Tighten the Allen screw inside the handle, turning the screw clockwise with the Allen wrench.
6. Remove the rag from the sink drain. Turn the shut-off valves beneath the sink counter-clockwise, slightly turning on the water. Remove the aerator from the faucet spout. Raise the faucet handle in the middle position, allowing water to flow through the faucet until the debris is removed and clear water flows out for a few seconds. Install the aerator. Raise the handle and check for any leaks. Adjust the shut-off valves to set the desired water pressure.
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