MOTOR FAILS TO TURN ON
• Loose or improper wiring.
• Pump circuit has no power.
• Blown tuse or thermal protection tripped.
• Failed pressure switch.
• Detective motor.
PUMP FAILS TO TURN OFF AFTER ALL FIXTURES ARE CLOSED
• Punctured diaphragm.
• Discharge line leak.
• Detective pressure switch.
• lnsufficient voltage.
• Clogged valves in pump head.
LOW FLOW AND PRESSURE
• Air leak at pump intake.
• Accumulation of debris inside pump or plumbing.
• Worn pump bearing (possibly accompanied by loud noise).
• Punctured diaphragm.
• Defective motor.
NOISY
• Check if the mounting fee! are compressed too tightly.
• Is the mounting surface flexible? lf so, il may be adding noise.
• Check for loose head/screws.
• lf the pump is plumbed with rigid pipe, then it may transmit noise more easily.
ABOUT THE BYPASS
Please consult a professional technician in the case that the bypass needs adjustment. lmproper
adjustment of the bypass may damage the pump.
The bypass comes preset for optimal operation of the pump. lf your application calls for a different setting
for the bypass, you may change it yourself. Carefully tighten the screw to increase or loosen the screw to
decrease the minimum operational pressure of the bypass.
AcAUTION
Please do follow the instruction manual to install the product. Any action outside what is recommended in
this manual may bring damage to the pump. Any inappropriate installation or operation that causes the
pump damage is not covered by warranty.
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4
SëAFLO
Diaphragm Pump Manual - 41 Series
The 41-Series pump provides high volume water flow. The four chamber high volume design, driven by a
heavy-duty motor, produces flow rates up to 4.5GPM. With on-demand switch, the 41-Series pumps are
self-priming, and can run dry without damage, performance reliable and low current. SEAFLO also offers a
variety of easy connect fittings and filters.
FEATURES
• 4 chamber diaphragm pump
• Run dry capable for normal workloads
• lntermittent duty
• Automatic: controlled by pressure switch
• lndustry standard mounting pattern
• Bypass: reduces cycling
APPLICATIONS
• Yacht/RV/caravan pressurized water system
• Sprayer fixtures (vehicle-mounted sprayers, electric sprayers)
• Cleaning machines, humidifier, water purification, medical apparatus
• Food beverage filling & liquid transfer
• Solar water system
• Any other pressurization system
INSTALLATION
Materials
1 diaphragm pump with related accessories
2 (at least) pieces of flexible, reinforced hose piping, with collapsing strength of twice the inlet collapsing
pressure( hose must be minimum 3/4" ID)
4 stainless steel hose clamps and screws
4 screws to fasten the pump to the mounting surface
1 electrical cutoff switch
1 fuse
1 screwdriver
1 streng cutting implement for tubing
(if desired) Teflon tape or sealant
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• Self priming
• Quiet Operation
• Thermal protection
Need help?
Do you have a question about the 41 Series and is the answer not in the manual?
Questions and answers
what is the cut in pressure of this pump