Also called water pressure reducing valves,
are compact, inexpensive regulators that perform two functions:
They automatically reduce the high incoming
water pressure from the city mains to provide a lower,
more functional pressure for distribution in the home.
The “regulate” by maintaining a set pressure
in the home usually 50 lbs. thereby insuring that the
home piping and appliances operate under a safe, more
moderate, but satisfactory pressure.