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3545 HARBOR GATEWAY SOUTH, SUITE 103, COSTA MESA, CA 92626, (800) 854-3218 WWW.SHURFLO.COM
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911-1026 Rev. F 07/15 ©Pentair, Inc. All Rights Reserved.
TROUBLESHOOTING
Vibration induced by driving can loosen
plumbing, strainers and pump hard-
ware. Check for system components
that are loose. Also, refer to the chart
below for trouble-shooting tips.
PUMP WILL NOT START/ BLOWS
CIRCUIT
√ Electrical connections, fuse or
breaker, main switch, and ground
connection.
√ Is the motor hot? Thermal breaker
may have triggered; it will reset
when cool.
√ Is voltage present at the switch?
Bypass pressure sw. Does the pump
operate?
√ Charging System for correct voltage
(±10%) and good ground.
√ For an open or grounded circuit, or
motor; or improperly sized wire.
√ For seized or locked diaphragm as-
sembly (water frozen?).
WILL NOT PRIME/SPUTTERS
(No discharge/Motor runs)
√ Is the strainer clogged with debris?
√ Is there water in the tank, or has air
collected in the hot water heater?
√ Is the inlet tubing/plumbing suck-
ing in air at plumbing connections
(vacuum leak)?
√ Is inlet/outlet plumbing severely
restricted or kinked? Restrictive
valves?
√ Proper voltage with the pump oper-
ating (±10%).
√ For debris in pump inlet/outlet
valves or swollen/dry valves.
√ Pump housing for cracks or loose
drive assembly screws.
RAPID CYCLING
√ For restrictive plumbing and flow
restrictions in faucets/shower
heads.
√ Water filter/purifier should be on
separate feed line.
√ Shut-off pressure set too low.
PUMP WILL NOT SHUT-OFF / RUNS
WHEN NOZZLE IS CLOSED
√ Output side (pressure) plumbing for
leaks, and inspect for leaky valves
or toilet.
√ For air trapped in outlet side (water
heater) or pump head.
√ For correct voltage to pump (±10%).
√ For loose drive assembly or pump
head screws.
√ Are the valves held open by debris
or is the rubber swollen?
√ Pressure switch operation. By-pass
set higher than shut-off.
NOISY OR ROUGH OPERATION
√ For plumbing which may have
vibrated loose.
√ For a restricted inlet (clogged
strainer, kinked hose, restrictive
valves).
√ Is the pump plumbed with rigid pipe
causing noise to transmit?
√ Does the mounting surface amplify
noise (flexible)? Does it bang like a
drum?
√ For mounting feet that are loose or
are compressed too tight.
√ For air in the system. Check all
fixtures for air and bleed system.
√ The motor with pump head re-
moved. Is noise from motor or
pump head?
LEAKS FROM PUMP HEAD OR SWITCH
√ For loose screws at switch or pump
head.
√ Switch diaphragm ruptured or
pinched.
√ For punctured diaphragm if water is
present in drive assembly.
SERVICE KITS
ITEM
4148-153-X75
PART #
4148-163-X75
PART #
4158-153-X75
PART #
4158-163-X75
PART #
1
94-801-10* 94-801-10* 94-801-10* 94-801-10*
2
94-800-01 94-800-01 94-800-01 94-800-01
3
94-801-02 94-801-02 94-801-12 94-801-12
4
94-71-001-07 94-71-001-03 94-71-000-17 94-71-001-04
1, 2, 3
94-801-11* 94-801-11* 94-801-13* 94-801-13*
Check Valve
(not shown)
94-800-03 94-800-03 94-800-03 94-800-03
*With preset switch and by-pass adjustment
2
3
4
1
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