146 DUCHAINE BLVD., NEW BEDFORD, MA. 02745-1292 TEL. 508-995-9711 FAX 508-995-5021 E-MAIL [email protected]
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DO NOT INSTALL THE PUMP AND PLUMBING
SO AIR WILL BE TRAPPED.
BECAUSE trapped air can completely restrict the
flow, or at the least require more work from the
pump resulting in early diaphragm failure. Install
pump and plumbing so any air introduced into the
plumbing will not be trapped but flow naturally
through liquid and out of the system.
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SHOULD NOT INSTALL PUMP WITH POSITIVE
HEAD ON THE INLET - Under standard operating
guidelines the pump should be above the liquid it is
being used to transfer.
BECAUSE of the flow through check valves,
stopping the pump will not stop the liquid from
flowing. Under the force of gravity liquid will pass
right through a diaphragm pump. Also consider a
diaphragm pump can not control a siphon
condition. They are used many times to start one.
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DISCHARGE FITTINGS, PIPE AND HOSE
SHOULD ALL BE THE SAME SIZE AND NEVER
BE SMALLER THAN THE INLET.
BECAUSE a smaller discharge line increases
work for the pump and increases the possibility
of clogging.
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USE ONLY LONG RADIUS ELBOWS.
BECAUSE a they reduce back pressure and
wear on the pump diaphragm. When pumping liquid
with solids they help prevent clogs in the plumbing.
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INSURE ALL HOSE AND FITTINGS ARE AIR
TIGHT.
Because self priming performance depends on air
tight suction line. It prevents leaks
Discharge
1.5"ID
Inlet
2" ID
DON'T
Step 7
Install Plumbing - Good pump performance requires plumbing to be installed properly for this pump.
P-120A -02 pg. 5
OK
OK
OK
Don’t
Don’t
OK
Air Tight
Against
Vacuum
Page 5 Installation - Plumbing