I recently bought a new shower head, so I applied plumber tape and installed it. I have a loud screeching sound as the water is running, despite making adjustments in water flow. Help!
In most cases any screech or squeal with plumbing is caused by forcing water through a small obstructed hole. I suspect you have some sealer or tape stuck in the shower head. Dismantle the head and rinse the screen and internal components.
Normally you don’t need plumber putty or tape. The head may seal to the pipe with a small, built-in gasket.