More in Kitchen
Turn off the hot and cold water supply valves, usually located directly under the sink. Open the tap to drain off the water.
Use an adjustable wrench to disconnect both faucet water lines from the supply tubes. Have a towel handy to catch the excess water that drains out.
Use a basin wrench to reach up behind the sink and disconnect the locknuts that hold the faucet to the sink.
Lift the old faucet out of its mounting hole. Use a putty knife to scrape away any old putty that remains around the hole, but take care not to scratch the sink surface.
Most sinks have three mounting holes to accommodate a faucet spout and twin hot and cold operating handles. The measurement between the handle holes is either 3" or 5". If the replacement faucet is a new single-handle unit, its mounting plate will cover the extra holes. However, if the new faucet is a traditional three-piece two-handled unit, you need to buy one that matches the sink’s hole dimensions. Newer sinks may have additional holes for accessories like a spray hose and soap dispenser. Unused holes can be covered by decorative caps (Image 1).
Most faucets sold today include a gasket to create a water-tight seal around the faucet base, which is less messy than bedding the faucet body or its mounting plate in plumber’s putty. Assemble the new faucet with the gasket according to the manufacturer's instructions, then insert the faucet tailpiece, its water lines and spray hose, if provided, into the center hole on the back of the sink (Image 2).
Under the sink, screw the mounting nut to the faucet tailpiece and tighten with a basin wrench (Image 3).
Connect the spray hose to the faucet tailpiece and attach the provided lead weight to the hose to keep it from tangling (Image 4).
Reattach the supply tubes to the faucet water lines (remember: hot water on the left, cold water on the right).
Tighten the water line nuts and open the shutoff valves. If any water leaks out through one or both nuts, tighten the nut an additional one-quarter turn.