Hale Rear Mount - Manual (Page 18)

PRESSURE GAUGE
The pressure gauge is usually graduated in pounds per square inch and/or bar. It is connected
to the pump discharge manifold, thus indicating the pump discharge pressure.
COMPOUND GAUGE
The compound gauge is graduated to read pressure in pounds per square inch and/or bar with
the vacuum in inches of mercury and/or bar. It is connected to the pump suction thus indicating
the suction pressure when pumping from a hydrant or the vacuum when pumping from draft.
HOSE DRAIN
A push-pull valve designed to be installed at the discharge valve. Used to drain a charged nose
when the discharge valve is closed.
MULTIPLE OR MASTER DRAIN VALVE
A valve to which all the drain cavities are piped for the purpose of a single drain valve
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