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Directions for Replacing a One-Handle Kitchen Faucet

A kitchen faucet will eventually need replacement, whether it's because it has worn out with age or your old faucet doesn't match your current kitchen design. Most kitchen faucets have standard installation procedures with similar parts and universal connections, so you don't have to replace water supply line fittings or change the opening size on your sink. Installation usually involves just a few steps that you can do yourself, rather than call a plumber.

Things You'll Need

  • One-handle faucets often come with an optional deck plate, which hides extra holes.
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Instructions

  1. Disconnect the Fittings

    • 1

      Turn off the main water supply. Open the old faucet to relieve water pressure in the line.

    • 2

      Disconnect the water supply from the faucet supply lines using an adjustable wrench. Spray the fittings with penetrating oil to loosen them if difficult to turn.

    • 3

      Unscrew the nuts holding the old faucet in place from beneath the sink. Use a basin wrench or pliers. In some models the faucet is attached using nuts on top of the sink. Remove the faucet handles and the deck plate using a Phillips screwdriver or an Allen wrench to remove the nuts.

    • 4

      Disconnect the sprayer from the diverter tube on your old faucet and unscrew the nut on the bottom of the sprayer hole that holds it in place.

    • 5

      Remove the old faucet from the sink. Clean the mounting area to remove grime and plumber's putty. Dry completely.

    • 6

      Set the plastic or rubber gasket provided with your faucet over the sink hole. If your faucet doesn't have a gasket, apply a bead of plumber's putty on the underside of the deck plate rim. This prevents moisture from the faucet from damaging your cabinets.

    • 7

      Place the deck plate, if you're using one, over the sink hole. Insert the faucet supply lines through the opening.

    • 8

      Install the washers and mounting hardware from beneath the sink, according to the manufacturer's directions. Typically washers and mounting nuts are supplied with your faucet.

    • 9

      Tighten the mounting nut by hand. Check that the faucet and deck plate are straight and positioned properly. Tighten the nut with an adjustable wrench.

    • 10

      Wrap Teflon tape around the threaded ends of the hot and cold water supply lines. If the fittings are compression fittings, you don't need plumber's tape. This type has a ring inside that forms to the pipe when you tighten the nuts.

    • 11

      Attach your new water supply lines to the faucet and then to the main water supply and hand tighten. Use a wrench to tighten securely, but avoid over-tightening.

    • 12

      Turn your faucet to the off position and turn on the main water supply.

    • 13

      Inspect the supply lines and the faucet for leaks. If you see a leak, turn off the faucet and tighten the fittings.

    • 14

      Turn on the faucet and inspect for leaks again. If you notice a leak, check that all connections are tight and there are no missing gaskets or improperly threaded connections.

    Optional Sprayer

    • 15

      Turn off the water supply and remove the cap from the faucet's diverter tube.

    • 16

      Slide the sprayer gasket provided with your faucet onto the hose guide. The edges of the gasket should be tucked under the hose guide.

    • 17

      Insert the threaded shank of the sprayer body through the hole from above your sink.

    • 18

      Tighten the nut provided over the threaded shank from beneath the sink. Insert the spray line through the sprayer body.

    • 19

      Attach the spray line to the diverter tube using a wrench. Turn the water supply on and test the sprayer to check for leaks.