Step 2 · Remove Old Faucet Trim
Carefully remove the existing faucet trim. This includes the hot handle, cold handle, and the central diverter handle. These are typically held on by a small set screw (requiring an Allen wrench) or a Phillips head screw hidden under a decorative cap. Once the handles are off, unscrew the surrounding trim plates, called escutcheons. Finally, unscrew the tub spout; you may need a strap wrench or pliers (with the jaws wrapped in tape to prevent scratching the finish) if it's tight.