Turn off the water supply to the bathtub
Open the faucet to drain any remaining water
Cover the drain to prevent losing small parts
Remove the faucet handle or trim plate
Unscrew and remove the old faucet spout or valve trim
Disconnect any supply lines or mounting hardware if needed
Clean the area around the pipe or valve opening
Apply plumber’s tape to threaded connections if required
Install the new faucet or spout
Tighten all screws, nuts, and fittings securely
Reinstall the handle and trim plate
Turn the water supply back on
Check for leaks
Test hot and cold water flow
Adjust or tighten fittings if necessary