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The performance of your pump will be affected by the diameter of the inlet
pipe - any restriction will greatly reduce the flow. We strongly recommend
that you use a pipe diameter as large as practical.
A gate valve may be installed in-line on the delivery side (outlet port) of the
pump which can be adjusted as required to regulate the flow of water, and
can assist in priming the pump.
CAUTION: DO NOT PLACE ANY SUCH OBSTRUCTION ON THE SUCTION
(INLET) SIDE OF THE PUMP UNLESS IT IS AN ISOLATOR VALVE IN A
GRAVITY FED SYSTEM. THESE PUMPS SHOULD NOT BE OPERATED WITH
THE DELIVERY VALVE COMPLETELY CLOSED.
To prevent unnecessary strain or possible distortion to the pump, ensure that
adequate support is provided to the hoses and or pipes. They will be
considerably heavier when filled with water.
Should contaminants come into contact with the pump, flush through with
cold water as soon as possible to prevent damage to the pump.
Protect the pump and pipework from freezing. The formation of ice may
cause serious damage.
Where the pump is to be a permanent fixture, the connections to the pump
MUST be flexible, i.e. a short piece of hose should be inserted between the
rigid pipework and the pump.
IMPORTANT: An air leak in the suction line will inhibit priming and reduce the
capacity of the pump.
Pay particular attention to the following:
• Keep all hoses as short and straight as possible and avoid sharp bends.
• Ensure there is adequate drainage for the discharged water.
• If a flexible hose must be laid across a roadway, protect it with
planking.
(Instantaneous shut off pressure, applied when a vehicle runs across an
unprotected hose, could cause “hydraulic shock”, which can damage the
pump and/or the hose).
CONNECTING A FOOT VALVE/FILTER
1. Attach a foot valve/filter to the end of the suction hose to prevent stones
etc, from being drawn up, which could cause damage to the pump.
Keep the strainer clean. If it is likely to clog with dirt or debris, proceed by
either:
a. Preparing a bed of stones on which to rest the strainer.
b. Tying the strainer so that it stays clear of the bottom of the pit,
pond or excavation.
c. Tie the strainer inside a basket or bucket.
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