CAUTION: INTENDED FOR COMMERCIAL AND INDUSTRIAL USE ONLY. READ SAFETY
GUIDELINES AND INSTRUCTIONS CAREFULLY.
This instruction sheet will provide you with information required to safely own and operate
Little Giant HT-6E series pumps. The pump you have purchased is a submersible effluent
pump for use in basins or lift stations and suitable for pumping effluent, wastewater and
other non-explosive, non-corrosive liquids with up to 1/2” spherical solids and tempera-
This instruction sheet covers the standard models in this pump series. If the catalog
number of your pump is not listed in the replacement parts section, then caution should
be exercised when ordering replacement parts. Always give the catalog number of your
pump when ordering replacement parts.
The Little Giant unit you have purchased is of the highest quality workmanship and material.
It has been engineered to give you long and trouble-free service.
The Little Giant pumps are carefully inspected, tested, and packaged to ensure safe
operation and delivery. When you receive your pump, examine it carefully to determine
that there are no broken or damaged parts that may have occurred during shipment. If
damage has occurred, make notation and notify the firm from which you purchased the
pump. They will assist you in the replacement or repair, if required.
READ INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR
SERVICE THE LITTLE GIANT PUMP. KNOW THE PUMP APPLICATIONS, LIMITATIONS,
AND POTENTIAL HAZARDS. PROTECT YOURSELF AND OTHERS BY OBSERVING ALL
SAFETY INFORMATION. FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT
IN PERSONAL INJURY AND/OR PROPERTY DAMAGE! RETAIN INSTRUCTIONS FOR
1. Do not use to pump flammable or explosive fluids such as gasoline, fuel oil, kero-
sene, etc. Do not use in explosive atmospheres or hazardous locations as classi-
fied by NEC, ANSI/NFPAT. Pump should only be used with liquids compatible with
pump component materials.
2. Do not handle pump with wet hands or when standing on a wet or damp surface, or
3. Do not pull the pump out of the water by the power cord when the pump is operating
or connected to power source.
4. This pump is supplied with a grounding conductor and/or grounding type attach
ment plug. To reduce the risk of electric shock, be certain that it is connected to a
properly grounded grounding type receptacle.
5. The National Electric Code requires a ground fault circuit interrupter (GFCI) be installed
in the branch circuit supplying fountain equipment, pools, etc.
6. In any installations where property damage and/or personal injury might result from
an inoperative or leaking pump due to power outages, discharge line blockage, or any
other reason, a backup system(s) and/or alarm should be used.
7. Support pump and piping when assembling and when installed, failure to do so may
cause piping to break, pump to fail, motor bearing failures, etc.
8. This pump’s motor housing is filled with a dielectric oil for motor heat transfer and
life-time lubrication of the bearings. This oil is non-toxic to aquatic life, however,
suffocation can occur if oil is left on the water surface. If oil escapes the motor housing,
it can be removed from the surface quickly by placing newspapers on the water surface
9. The pump motor is equipped with an automatic resetting thermal protector and may
restart unexpectedly. Protector tripping is an indication of motor overloading as a result
of excessively high or low voltage, inadequate wiring, incorrect motor connections,
or a defective motor or pump.
1. Check the pump label for proper voltage required. Do not connect to voltage other
2. If pump is supplied with a 3-prong electrical plug, the third prong is to ground the
pump to prevent possible electrical shock hazard. DO NOT REMOVE the third prong
from the plug. A separate branch circuit is recommended. Do not use an extension
3. If the cord is equipped with stripped lead wires, such as on 230V models, be sure
that the lead wires are connected to a power source correctly. The green/yellow wire
is the ground, the other two are live.
4. Check local electrical and building codes before installation. The installation must
be in accordance with their regulations as well as the most recent National Electrical
5. To conform to the National Electrical Code, all pumps must be wired with 14 AWG or
larger wire. For runs to 250 feet, 14 AWG wire is sufficient. For longer runs, consult a
qualified electrician or the factory.
6. Pump should be connected or wired to its own circuit with no other outlets or equip
ment in the circuit line. Fuses and circuit breaker should be of ample capacity in the
7. The flexible PVC jacketed cord assembly mounted to the pump must not be modified
in any way, with the exception of shortening the cord to fit into a control panel. Any
splice between the pump and the control panel must be made within a junction box
and mounted outside of the basin and comply with the National Electrical Code.
1. Pump should be installed in a suitable basin which is at least 18” in diameter and 24”
deep, in accordance with local plumbing codes.
2. When a pump is in a basin, etc. do not touch motor, pipes or water until unit is
unplugged. If your installation has water or moisture present, do not touch wet area
until all power has been turned off.
3. Pump features a 1-1/2“ female NPT discharge.
4. Pump must be placed on a hard level surface. Never place pump directly on clay,
earth or gravel surfaces.
5. A check valve must be used in the discharge line to prevent back flow of liquid into
the basin. The check valve should be a free flow valve that will easily pass solids.
CAUTION: For best performance of check valves, when handling solids install in a
horizontal position or at an angle of no more than 45 degrees. Do not install check
valve in a vertical position as solids may settle in valve and prevent opening on start-
6. Do not attempt to restrict the intake side of these pumps. Restricting the intake may
cause damage to the seal and may starve the pump. If you require reduced flow
rates, then place a valve on the discharge side of the pump or if flexible vinyl tubing
is used, a clamp can be used on the tubing to restrict the flow.
7. Do not let the unit operate dry. It is designed to be cooled by pumping fluid. You may
damage the seal and the motor may fail if the pump is allowed to run dry.
8. If the unit is going to be idle for a period of time, follow the cleaning instructions
outlined in the next section. Do not let the unit freeze in the wintertime. This may
cause cracking or distortion that may destroy the unit.
NOTE: BE CERTAIN PUMP IS SECURE IN BASIN AND FLOAT MOVES UNOBSTRUCTED
WITHOUT TOUCHING THE BASIN WALLS OR PLUMBING.
1. These pumps are equipped with a float operated switch.
2. When these pumps are installed in a basin with a sealed cover, switch operation cannot
be observed. The sump cover usually will have a spare hole that is plugged with a rubber
plug. This plug can be removed and switch operation can be observed.
3. Plug power cord into a grounded receptacle with voltage consistent with pump voltage
as indicated on pump nameplate.
4. Run water into basin until pump starts.
5. Be sure gate valve in discharge line is open.
6. Allow pump to operate through several on-off cycles.
MAKE CERTAIN THAT THE UNIT IS DISCONNECTED FROM THE POWER SOURCE
BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY COMPONENT!
1. If pump does not operate properly, consult the Troubleshooting Chart. If trouble cannot
be located with these steps shown, consult your pump dealer or take pump to a Little
Giant authorized service center.
2. This unit is permanently lubricated. Oiling is not required. Do not, in any case, open
the sealed portion of the unit or remove housing screws.
3. Periodic cleaning of the pump parts will prolong the LIFE and EFFICIENCY of the
4. Remove screws that hold base to volute and clean impeller and volute passage. Do
not use strong solvents on impeller.
5. Be sure impeller turns freely after cleaning.
6. WARNING: DO NOT REMOVE IMPELLER. REMOVAL OF IMPELLER REQUIRES
SPECIAL TOOLS AND IS TO BE DONE ONLY BY AN AUTHORIZED SERVICE
CENTER. DO NOT REMOVE MOTOR HOUSING COVER. WARRANTY IS VOID
IF MOTOR HOUSING COVER, IMPELLER OR SEALS HAVE BEEN REMOVED.
ANY REPAIR ON MOTOR MUST BE DONE BY AN AUTHORIZED LITTLE GIANT
7. Be certain power cord is in good condition and contains no nicks or cuts.
Discharge pipe no smaller than pump outlet
Place pump on hard level surface. Never place
directly on clay, earth or gravel surface.
Gas Tight Basin 18" dia. x 24" deep min.
Separate protected and grounded se
rvice outlet 4' from floor min.
Oklahoma City, OK 73157-2010
405.947.2511 • Fax: 405.947.8720
