You close the 2 shut off valves below the faucet, remove the pipes going to faucet from both ends. Now you will see the 2 large flat nuts holding the faucet to countertop. These will be easier to remove with a plumbers faucet wrench (about $8 in your hardware store) This has a long shaft and a flat spring loaded head. Remove both nuts and pull faucet out. When you go th get new faucet,also buy braided SS flexible water lines. About $4 each, they are much simpler and better than the cheap grey plastic ones. Re-connect everything opposite order.
As in any faucet, you take it apart and replace the cartridge or the rubber seal.
You dismantle it and replace the seal.
With the faucet shut off, take the handle off and under it is a nut around the stem. There is either an O ring under the nut, a fiber washer or stem packing depending on what type of faucet it is. Replace which ever it has and that should fix it. If your faucet is a screw type, the handle turns several time when opening it, you can probably take the nut off, wrap two or three wraps of stem packing around the stem, clockwise looking down on it and replace the nut and tighten. This will compress the packing around the stem without replacing the cone washer in the nut or all of the old packing.
A trim kit is just the outside parts that you see. This will make you faucet look better, but it wont affect the function of your old valve. If your shower valve doesn't work right, replace it.
About one hour unless it is a really unusual situation
To replace an old shower faucet with a new one, first turn off the water supply to the shower. Remove the old faucet by unscrewing it from the wall. Install the new faucet by following the manufacturer's instructions and securing it in place. Turn the water supply back on and test the new faucet for leaks.
To replace a faucet washer, turn off the water supply, unscrew the faucet handle, remove the old washer, and replace it with a new one of the same size. Reassemble the faucet handle and turn the water supply back on to test for leaks.
To replace a faucet cartridge for a double handle faucet, first turn off the water supply. Remove the handles and trim to access the cartridge. Unscrew the old cartridge and replace it with a new one. Reassemble the faucet and turn the water supply back on.
To update and replace old bathroom faucets, you can follow these steps: Turn off the water supply to the faucet. Remove the old faucet by unscrewing it from the sink or countertop. Clean the area where the old faucet was installed. Install the new faucet according to the manufacturer's instructions. Turn the water supply back on and test the new faucet for leaks.
To replace a bathroom faucet, first turn off the water supply. Then, disconnect the old faucet and remove it. Install the new faucet by following the manufacturer's instructions. Finally, turn the water supply back on and test the new faucet for leaks.
To replace a bathroom faucet washer, first turn off the water supply to the faucet. Next, unscrew the faucet handle and remove the old washer. Replace it with a new washer of the same size and type. Reassemble the faucet handle and turn the water supply back on to test for leaks.
To replace a bathtub faucet, first turn off the water supply, remove the old faucet by unscrewing it, clean the area, and install the new faucet following the manufacturer's instructions. Finally, turn the water supply back on and test the new faucet for leaks.
To replace a Moen kitchen faucet, first turn off the water supply. Disconnect the old faucet and remove it. Install the new faucet following the manufacturer's instructions. Connect the water supply lines and test for leaks.
To replace an old bathtub faucet, you will need to turn off the water supply, remove the old faucet by unscrewing it, clean the area, and install the new faucet by following the manufacturer's instructions. Finally, turn the water supply back on and test the new faucet for leaks.
To replace a sink faucet, first turn off the water supply, disconnect the old faucet, and remove it. Then, install the new faucet by following the manufacturer's instructions, connecting the water supply lines, and securing the faucet in place. Finally, turn the water supply back on and test the new faucet for leaks.
To replace a Moen kitchen faucet, first turn off the water supply. Disconnect the old faucet and remove it. Install the new faucet following the manufacturer's instructions. Reconnect the water supply and test for leaks.
To replace a kitchen faucet with a sprayer, first turn off the water supply. Disconnect the old faucet and remove it. Install the new faucet with sprayer according to the manufacturer's instructions. Connect the water supply lines and test for leaks.