Installing or changing a kitchen faucet and taps is an easy task. It's also an easy way to add a new designer's touch to your kitchen, or to update an old leaky set. The below details will assume that you have already chosen your new taps and that you know they will fit into the holes on your sink.
Turn off the water supply to your taps. The shutoffs are found under the sink. If the lines do not have shut off valves, you will have to turn off the main water valve. Open your faucet to release all water in the lines. When it's empty, turn the faucet off.
Unscrew the nuts for the faucet from underneath the sink using a basin wrench. If the nuts don't come off easily or are rusted, apply a spray of WD-40 and wait a few minutes before trying again.
Remove the taps and faucet by pulling up on them from above the sink. Scrape away the old silicone sealer with your putty knife. Clean the area. This is also a good time to replace any old feed pipes with new ones, such as stainless steel braided supply lines if you wish. Just remove the feed pipes between the taps and housings.
Apply plumber's putty underneath the new faucet and tap set. Place the set into the holes and press down to allow the putty to form a watertight seal.
Place all nuts and washers back underneath the faucet and connect the water lines and valves to the faucet again.
Turn the water back on, and turn on your taps. If there are no leaks from the faucet, the taps, or from underneath, you are good to go.