WATER PURFICATION
911-585 REV. E
1
SHURFLO
®
LO-FLO 105 SERIES RV PUMPS
INSTALLATION MANUAL
SHURflo lo-flo 105 Series RV pumps are rugged, lightweight, compact and provide the ability to self-prime and run dry.
Standard features include a pressure demand switch, built in 3/8” hose barb ports, flexible mounting feet, splash proof motor,
and thermal protector. All with the security that comes with a Ul Recognized Component.
INSTALLATION
SHURflo lo-flo 105 Series RV pumps are self-priming and can be located up to 2.5
feet above the water level. Horizontal and vertical prime vary depending on the fluid
viscosity and pump configuration. The pump can be at the same level or below the
tank.
❚
The pump should be located in an area that is dry and properly ventilated to pre-
vent heat build-up.
❚
Use 50-mesh strainer minimum at the inlet side of the pump. Use flexible hose on
inlet.
❚
The pump can be mounted in any position. However, if mounting the pump verti-
cally the pump head should be in the down position so that in the event of a leak,
fluid will not enter the motor.
❚
12 Volt pump must be provided with a 5-amp fuse.
❚
Recommended wire size is 16 gauge (1.3 mm) or larger wire as determined by volt-
age drop. Negative (-) must be connected to a known ground. Ground wire must be
the same (gauge/mm) as the positive.
TROUBLESHOOTING
PUMP WILL NOT START
√ for correct voltage (+10%) and
electrical connections
√ fuse or breaker
√ Pressure switch operation and
correct voltage at switch
√ Rectifier or motor for open or
grounded circuit
√ for locked drive assembly
PUMP WILL NOT PRIME
(No Discharge/Motor Runs)
√ Strainer for debris
√ Inlet/outlet tube severely restricted
(kinked)
√ Inlet /outlet valves for debris or
swelling
PUMP WILL NOT SHUT-OFF
√ output line closed and no leaks
√ for air trapped in outlet line or
pump head
√ for correct voltage to pump
√ Debris in pump Inlet/outlet valves
√ for loose drive assembly or pump
head screws
√ Pressure switch operation/adjust-
ment
LEAKS FROM PUMP HEAD OR SWITCH
√ for loose screws at switch or pump
head
√ Switch diaphragm ruptured or
pinched
√ for punctured diaphragm if fluid is
present at drain holes
To Faucet
City Water
Check Valve
Alternate Plumbing
for City Water Entry
From Pump
“T” Fitting
RED(+)
PUM P
SWITCH
BLACK(-
)
FUSE
BATTERY
50 Mesh Strainer Required if using SHURFLO P/N 170-06X-00
A 1/2” to 3/8” Barb splicer is required.
Water Tank
Plumbing Systems can vary.
Consult SHURflo for detailed
information.
