Pump Placement - Honda WT40 Owner's Manual

PUMP PLACEMENT

For best pump performance, place the pump near the water level, and use
hoses that are no longer than necessary. That will enable the pump to produce
the greatest output with the least self-priming time.
As head (pumping height) increases, pump output decreases. The length, type,
and size of the suction and discharge hoses can also significantly affect pump
output.
Discharge head capability is always greater than suction head capability, so it is
important for suction head to be the shorter part of total head. The maximum
available suction head will vary based on the operating conditions. However,
the suction head can never exceed 26 feet (8 meters) and should always be kept
as low as possible.
Minimizing suction head (placing the pump near the water level) is also very
important for reducing self-priming time. Self-priming time is the time it takes
the pump to bring water the distance of the suction head during initial
operation.
DISCHARGE
HEAD
SUCTION HEAD
LESS THAN
26 feet (8 meters)
OPERATION
TOTAL HEAD
15