On Aug 7, 11:01*am, TN wrote:
4 year old american standard shower *single handle" faucet with shower
head in shower stall. *The dang thing out of the blue just starts
dripping in the middle of the night for a short blast and then stops
again. *Is the likely just the washer in the faucet or might it be
something in the shower head?

No, it's the municipal water pressure. In the middle of the night
nobody is using much water, so the pressure goes up.

You should have a regulator installed at the water meter before
something blows up.