Turn off the water supply to the shower (or shut off the main water if needed)
Remove the shower head by hand if it’s a threaded model
If it’s stuck, use an adjustable wrench while holding the shower arm with another wrench to prevent damage
Wrap plumber’s tape (PTFE) clockwise around the shower arm threads
Attach the new shower head by hand, then tighten slightly with a wrench
Reconnect any hose/adapter if your shower head uses one
Turn the water back on and check for leaks around the connection
If leaking, shut off the water, adjust the fit, and reapply plumber’s tape as needed
Test the shower pattern and temperature settings to confirm proper operation