PRIVATE WATER SYSTEMS - Installation - Control Units - Pressure Relief
Piston Pumps
For either shallow or deep-well
piston pumps, a relief valve
is used to relieve excess pressure
in case something causes the automatic pressure switch to fail.
Instead of pressure continuing to
build to where the motor, pump, or
tank is damaged, the relief valve
opens. Enough water escapes to
keep the pressure within safe limits.
Centrifugal or Jet Pumps
These pumps seldom have relief valves.
As pressure on them builds, the
pumping capacity decreases. The
pressure finally climbs high
enough that all pump action stops.
That point is usually still low
enough to prevent any damage to
the storage tank and pump.