How to Install a Wall Mounted Shower Head

By Bob Formisano, About.com Guide

Install New Shower Head - With Washer

If the shower head comes with a washer, proceed as follows:

Place the rubber washer into the shower head.
Screw the shower head onto the goose-neck shower arm and hand tighten as tight as possible.
Turn the water back on at the faucet and check for leaks.
If the shower head leaks at the connection to the threaded shower arm, you need to re-tighten by hand. Don't use a wrench with these types of heads as you can force the washer up inside the shower arm.

Bob Formisano
Home Repair Guide