The distance that the water level in the well is lowered by pumping.
It is the difference between the STATIC WATER LEVEL and the PUMPING
The vertical distance between the level where fluid enters a pipe and
the level where it leaves. It must be added to the TOTAL DISCHARGE HEAD
if the inlet is lower than the outlet and subtracted if the inlet is
higher. As a rule of good installation practice, however, pipes should
slope continuously upward from the inlet to the outlet to prevent entrapment
The loss of pressure or head due to the resistance to flow in the pipe
and fittings. Friction loss is influenced by pipe size and fluid velocity,
and is usually expressed in feet of head.
The horizontal distance between the point where fluid enters a pipe
and the point at which it leaves.
The lowest water level reached during pumping operation.
The range of pressure in the pressure tank during the pumping cycle,
usually expressed in pounds per square inch gauge (P.S.I.G.).
The vertical distance from the level at which the discharge pipe leaves
the well to the bottom of the pump or jet assembly in the well.
OR STANDING WATER LEVEL
The undisturbed level of water in the well before pumping.
The vertical distance between PUMPING LEVEL and the bottom of the pump
or jet assembly. Submergence must be sufficient to insure that the suction
opening of the pump or jet assembly is always covered with water, while
maintaining enough clearance from the bottom of the well to keep it
out of sediment (at least 10 feet clearance is recommended).
The total pressure or head the pump must develop. It is the sum of the
depth to PUMPING LEVEL, THE ELEVATION, THE SERVICE PRESSURE, and THE
FRICTION LOSS. Of course, all of these measurements must be expressed
in the same units, usually feet of head, before adding them together.