Powerhorse 50110 User manual

SAVE THESE INSTRUCTIONS
SUBMERSIBLE SUMP PUMPS
Owner’s Manual
WARNING: Read carefully and understand all ASSEMBLY AND OPERATION
INSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety
precautions may result in serious personal injury.
Item #50110 & #50131

Page 2 of 22
Thank you very much for choosing a Powerhorse product!
For future reference, please complete the owner’s record below:
Serial Number/Lot Date Code: ________________________________
Purchase Date: ____________________________________________
Save the receipt, warranty, and this manual. It is important that you read
the entire manual to become familiar with this product before you begin
using it.
These pumps are designed for certain applications only. Northern Tool
and Equipment cannot be responsible for issues arising from
modification or use of these products in applications for which they were
not designed. We strongly recommend that these products not be
modified and/or used for any application other than that for which they
were designed.
For technical questions, please call 1-800-222-5381.

Page 3 of 22
Table of Contents
Intended Use..........................................................................................................................................4
Technical Specifications......................................................................................................................4
Important Safety Information...............................................................................................................5
Specific Operation Warnings...............................................................................................................8
Grounding..............................................................................................................................................9
Installation ...........................................................................................................................................10
Before Each Use..................................................................................................................................13
Operating Instructions........................................................................................................................14
After Use ..............................................................................................................................................15
Maintenance ........................................................................................................................................15
Parts Diagram - 50110.........................................................................................................................16
Parts List - 50110.................................................................................................................................17
Parts Diagram - 50131.........................................................................................................................18
Parts List - 50131.................................................................................................................................19
Troubleshooting..................................................................................................................................20
Replacement Parts..............................................................................................................................20
Limited Warranty.................................................................................................................................21

Page 4 of 22
Intended Use
This sump pump can be used to drain rain water, infiltration water, domestic waste water or to remove
water from flooded rooms. The pump can be completely or partially submersed and used to transfer
clean or moderately dirty fluids.
Technical Specifications
50110, 1/3 HP Pump
Property
Specification
Voltage
115VAC,60HZ
Motor
1/3 HP
Amperage
5.5A
Max. Head (ft.)
20Ft
Max. Flow Rate (GPH)
3600GPH
Weight
24 lbs.
50131, 3/4 HP Pump
Property
Specification
Voltage
115VAC, 60HZ
Motor
3/4 HP
Amperage
8.5A
Max. Head (ft.)
27.5Ft
Max. Flow Rate (GPH)
4200GPH
Weight
26 lbs.

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Important Safety Information
Read and understand all instructions. Failure to follow all instructions may result in serious injury.
The warnings, cautions, and instructions in this manual cannot cover all possible conditions or
situations that could occur. Exercise common sense and caution when using this tool. Always be
aware of the environment and ensure that the tool is used in a safe and responsible manner.
DO NOT allow persons to operate or assemble this product until they have read this manual and
have developed a thorough understanding of how the product works.
DO NOT modify the product in any way. Unauthorized modification may impair the function and/or
safety and could affect the life of the product. There are specific applications for which the product
was designed.
Use the right tool for the job.DO NOT attempt to force a small equipment to do the work of larger
industrial equipment. There are certain applications for which this equipment was designed. It will
do the job better and more safely at the capacity for which it was intended. DO NOT use this
equipment for a purpose for which it was not intended.
Industrial or commercial applications must follow OSHA requirements.
This product may contain chemicals known to the State of California to cause cancer, birth
defects or other reproductive harm.
WORK AREA SAFETY
Inspect the work area before each use. Keep work area clean, dry, free of clutter, and well lit.
Cluttered, wet, or dark work areas can result in injury. Using the product in confined work areas
may put you dangerously close to other cutting tools and rotating parts.
Do not use the product where there is a risk of causing a fire or an explosion; e.g., in the
presence of flammable liquids, gases, or dust. The product can create sparks, which may ignite
the flammable liquids, gases, or dust.
Do not allow the product to come into contact with an electrical source. The tool is not insulated
and contact will cause electrical shock.
Keep children and bystanders away from the work area while operating the tool. Do not allow
children to handle the product.
Be aware of all power lines, electrical circuits, water pipes, and other mechanical hazards in your
work area. Some of these hazards may be hidden from your view and may cause personal injury
and/or property damage if contacted.

Page 6 of 22
PERSONAL SAFETY
Stay alert, watch what you are doing, and use common sense when operating the tool. Do not
use the tool while you are tired or under the influence of drugs, alcohol, or medication. A moment
of inattention while operating the tool may result in serious personal injury.
Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair, clothing
and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving
parts. Air vents on the tool often cover moving parts and should be avoided.
Wear the proper personal protective equipment when necessary. Wear ANSI Z87.1 compliant
safety goggles or safety glasses with side shields, or when needed, a face shield. Use a dust
mask in dusty work conditions. Also use non-skid safety shoes, hardhat, gloves, dust collection
systems, and hearing protection when appropriate. This applies to all persons in the work area.
Do not overreach. Keep proper footing and balance at all times.
Do not use the tool when tired or under the influence of drugs, alcohol or medication.
Ensure the power switch is off prior to plugging in the tool.
Remove keys or wrenches before connecting the tool to an air supply, power supply, or turning on
the tool. A wrench or key that is left attached to a rotating part of the tool may cause personal
injury.
Secure the work with clamps or a vise instead of your hand when practical. This safety precaution
allows for proper tool operation using both hands.
ELECTRICAL SAFETY
Grounded tools must be plugged into an outlet properly installed and grounded in accordance
with all codes and ordinances. Never remove the grounding prong or modify the plug in any way.
Do not use any adapter plugs. Check with a qualified electrician if you are in doubt as to whether
the outlet is properly grounded. If the tools should electrically malfunction or break down,
grounding provides a low resistance path to carry electricity away from the user.
Double insulated tools are equipped with a polarized plug (one blade is wider than the other). This
plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the
plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change
the plug in any way. Double insulation eliminates the need for the three wire grounded power cord
and grounded power supply system.
Do not allow the product to come into contact with an electrical source. The tool is not insulated
and contact will cause electrical shock.
Avoid body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerators.
There is an increased risk of electric shock if your body is grounded.
Do not abuse the power cord. Never use the power cord to carry the pump or pull the plug from
an outlet. Keep the power cord away from heat, oil, sharp edges, or moving parts. Replace
damaged power cords immediately. Damaged power cords increase the risk of electric shock.
When operating a power tool outside, use an outdoor extension cords marked “W-A” or “W”.
These extension cords are rated for outdoor use, and reduce the risk of electric shock.

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PUMP USE AND CARE
Do not force the pump. Pumps do a better and safer job when used in the manner for which they
are designed. Plan your work, and use the correct product for the job.
Check for damaged parts before each use. Carefully check that the pump will operate properly
and perform its intended function. Replace damaged or worn parts immediately. Never operate
the pump with a damaged part.
Do not use a pump with a malfunctioning switch. Any pump that cannot be controlled with the
power switch is dangerous and must be repaired by an authorized service representative before
using.
Disconnect the power/air supply from the pump and place the switch in the locked or off position
before making any adjustments, changing accessories, or storing the tool. Such preventive safety
measures reduce the risk of starting the tool accidentally.
Store the pump when it is not in use. Store it in a dry, secure place out of the reach of children.
Inspect the tool for good working condition prior to storage and before re-use.
Use only accessories that are recommended by the manufacturer for use with your pump.
Accessories that may be suitable for one product may create a risk of injury when used with
another tool. Never use an accessory that has a lower operating speed or operating pressure
than the tool itself.
Keep guards in place and in working order. Never operate the product without the guards in
place.

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Specific Operation Warnings
Wear ANSI Z87.1 compliant goggles.
DO NOT start pump or run pump dry. Prime pump before each use.
Do not submerge pump in water. For indoor use only.
Pump clean water only. DO NOT use for salt water, brine, laundry discharge or any application
that may contain foreign materials and/or caustic chemicals.
Never pump gasoline or flammable liquids with this product.
Do not operate pump where flammable or explosive fumes or gases are present. Explosion, fire,
or serious injury may result.
Do not use this product to pump chemicals or corrosive liquids, damage to seals and moving
parts will result.
Do not run the pump with the outlet closed or blocked. The excessive pressure will cause the
pump to explode and cause injury or death.
Before using any pump, check for alignment and binding of moving parts; any broken parts or
mounting fixtures; and any other condition that may affect proper operation. Any part that is
damaged should be properly repaired or replaced by a qualified technician.
Do not pump water that is hotter than 95 F.
Electrical connections must be moved to higher ground where there is a risk of flooding.
Unplug before servicing and when changing accessories.
When servicing, use only identical replacement parts. Only use accessories intended for use with
this pump. Approved accessories are available.
Do not let water inside pump freeze or let frost build up on pump.
No alterations shall be made to this product.
Do not use in swimming pools or marine areas.
Not for use by or around children.
ELECTRIC SHOCK HAZARD
Always connect this product to a grounded outlet equipped with a ground fault circuit interruption
device (GFCI).
Before installing this product, have a licensed or certified electrician inspect the outlet to be sure
the outlet is correctly grounded. (DO NOT remove ground pin on cord).
Do not remove or modify the round ground prong on the power cord plug or use an adapter
(cheater plug) that eliminates the ground prong. A shock hazard is created and serious injury can
result.
DO NOT plug in power cord when wet or while standing on damp/wet ground.
Do not use an extension cord with this product.
Always keep one hand free when plugging this product into an electrical power cord.
DO NOT operate if power cord or electrical components are damaged or seals are compromised.
DO NOT attempt to service or open this product while it is connected to an electrical power
supply.
DO NOT lift this product by the electrical power cord.

Page 9 of 22
Grounding
The pump must be grounded while in use to protect the operator from electrical shock. It is
equipped with an electric cord that has an equipment-grounding conductor and a grounding plug.
The plug MUST be plugged into a matching receptacle that is properly installed and grounded in
accordance with ALL local codes and ordinances.
DO NOT MODIFY THE PLUG PROVIDED. If it will not fit the receptacle, have the proper
receptacle installed by a qualified electrician.
CHECK with a qualified electrician or service person if you do not completely understand the
grounding instructions, or if you are not sure the tool is properly grounded.
Grounded Tools: Tools with 3-Prong Plugs
Tools marked with Grounding Required have a 3-wire cord and 3-prong grounding plug. The plug
must be connected to a properly grounded outlet. If the tool should electrically malfunction or break
down, grounding provides a low resistance path to carry electricity away from the user, reducing the
risk of electric shock. (See Figure A.)
The grounding prong in the plug is connected through the green wire inside the cord to the grounding
system in the tool. The green wire in the cord must be the only wire connected to the tool’s grounding
system and must never be attached to an electrically live terminal.
Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance
with all codes and ordinances. The plug and outlet should look like those in the following illustration.

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Installation
Before the first installation of the pump, make sure all the parts are present. Compare the contents of
the shipping crate with the packing list. If any part is missing or damaged, do not install the pump. If
any parts are missing or damaged, contact customer service for replacement parts (see the
Replacement Parts section in this manual for the phone number).
Tools Required:
Pipe wrench, Strap Wrench, or Slip-Joint Pliers,
Hacksaw,
Screw Driver,
File or Sandpaper
Materials Required:
1-1/2＂ABS or PVC Pipe with Cement to match
Threaded Adapter (Pipe to Pump)
Check Valve: Purchase a check valve for the pump discharge piping
Never lift the pump by the power cord.
Installation Instructions
1A. Minimum sump size:12” (305mm) diameter by 12” (305mm) depth for vertical switch models; 18”
(457mm) diameter by 18” (457mm) depth for tethered switch models. (See Figure 1.)
1B. Construct the sump pit of tile, concrete, steel, or plastic; it must meet local codes.
1C. Make certain that no clay, earth, sand, or gravel are in the sump (they will clog the pump).Keep
the pump inlet screen clear.
Figure 1

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2A. Install the discharge plumbing and a check valve using Teflon tape-NOT pipe joint cement.
Install the check valve in the vertical discharge pipe to prevent flow backwards through the pump
when it shuts off. If the check valve does not have a 1/8＂anti-airlock hole, drill one in the
discharge pipe just below the valve. Be sure to install the check valve so that the flow will be
away from the pump (an arrow on the valve side will show the flow direction). (See Figure 2.)
2B. Tighten the pipe into the pump (hand tight + 1-1/2 turns).
2C. To prevent air locking the pump (a restriction of, or complete stoppage of liquid flow caused by
gas trapped in a high point of a liquid-filled pipe system), drill a 1/8” (3.2mm) hole in the
discharge pipe just above where it screws into the pump discharge. Install the check valve above
this hole, but keep it as close to the pump as possible. Be sure the hole is below the waterline
and below the check valve.
2D. To reduce noise and vibration cut the discharge pipe near the pump and fasten a short length of
rubber hose (1-7/8” (48mm) I.D., e.g. radiator hose) into it with hose clamps.
Figure 2
3. Place the pump in the sump; make sure that nothing interferes with switch operation.
(See Figure3).CAUTION: Make sure the pump cannot move in the sump. If the pump moves
when it runs, the piping or sump wall may interfere with the switch and prevent the pump from
starting or stopping causing a risk of flooding.
Figure 3

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4. Finish installing the necessary plumbing. Follow the pipe glue manufacturer’s instructions for
safety precautions and curing time.
5A. Power Supply: This pump requires a 115V, 60Hz, 15 amp individual branch circuit. The circuit
must be grounded and should be dedicated to the sump pump.
5B. The pump is supplied with a 3-wire cord set with grounding- type plug. Insert the switch plug
directly into the outlet then insert the pump plug into the back of the switch plug. (See Figure 4.)
CAUTION: To avoid the risk of electrical shock, always ground the pump to a suitable electrical
ground, such as a grounded metal water pipe, a properly grounded metallic raceway, or a ground wire
system. Do not cut off the round ground pin from the pump or switch plugs.
Figure 4
6. Check pump operation by filling the sump with water and observing the pump’s operation
through one complete cycle. CAUTION: Failure to make this operational check may lead to
improper operation, premature failure, and flooding.
Figure 5
Pump Plug
Switch Plug

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Before Each Use
Inspect the work area before each use. Keep work area clean, dry, free of clutter, and well lit.
Cluttered, wet, or dark work areas can result in injury. Using the tool in confined work areas may
put you dangerously close to other cutting tools and rotating parts.
Check for damaged parts before each use. Carefully check that the pump will operate properly
and perform its intended function. Replace damaged or worn parts immediately. Never operate
the pump with a damaged part.
Do not use the pump where there is a risk of causing a fire or an explosion; e.g., in the presence
of flammable liquids, gases, or dust. The tool can create sparks, which may ignite the dust or
fumes.
Keep children and bystanders away from the work area while operating the pump. Do not allow
children to handle the pump.
Be aware of all power lines, electrical circuits, water pipes, and other mechanical hazards in your
work area. Some of these hazards may be below the work surface hidden from your view and
may cause personal harm or property damage if unintentionally contacted.

Page 14 of 22
Operating Instructions
Stay alert, watch what you are doing, and use common sense when operating the pump. Do not
use the pump while you are tired or under the influence of drugs, alcohol, or medication. A
moment of inattention while operating the pump may result in serious personal injury.
Use ANSI-approved safety goggles or safety glasses with side shields, or when needed, a face
shield. Also use non-skid safety shoes, gloves, and hearing protection when appropriate.
Do not place the pump in water while it is connected to electric power and do not plug the pump in
to an electric socket with wet hands.
This pump is designed for use with clean water only. It cannot be used with sea water, dirty or
gritty water, or flammable, corrosive, explosive or dangerous liquids. Dirty water or sand will
damage the pump. If the water is dirty, use a filter on the inlet.
Do not use in the presence of flammable or explosive vapors. Using this pump with or near
flammable liquids or vapors can cause an explosion or fire, resulting in property damage, serious
personal injury and/or death.
NEVER allow the pump to run dry.
Always make sure the pump is unplugged before the supply water level gets below the
suction line inlet. At water levels below the inlet, the pump may begin to pump air and be
EXTREMELY LOUD, which will cause the pump to overheat and burn out. Running the pump
without sufficient water will damage it.
The pump housing may be HOT while operating and can cause serious skin burns. To avoid
burns, unplug the pump and allow time for it to cool after periods of extended use.
1. Make sure there is ample water for the pump.
2. If not already connected to power, insert the switch plug into a 115 volt GFCI power outlet (for
automatic operation) and the pump plug into the back for the switch plug. For manual operation
insert only the pump plug directly in the outlet. The pump will start operating.
Note: The motor is equipped with an automatically resetting thermal overload protector. If the motor
overheats, the pump shuts off. Then when it cools sufficiently, the overload protector resets and the
motor restarts.
If the overload protector stops the pump repeatedly, disconnect the power from the pump and after
the pump cooling down, check to find the problem. Low voltage, a long extension cord, clogged
impeller, screen blocked by debris, or water that is too hot can cause the motor to overheat.
If the pump is operating and suddenly no water comes out of the discharge hose, shut off the unit
immediately! The inlet screen may be blocked by debris. Check for the cause and correct it before
attempting to restart the pump.

Page 15 of 22
After Use
Before moving the pump after use, unplug it then allow time for it to cool because it will be HOT.
Drain the pump housing.
Never lift the pump by the power cord.
Store the pump when it will not be used for a long time. Store it in a dry, secure place out of the reach
of children. Make sure the stored pump is protected from frost and freezing. Inspect the pump for
good working condition prior to storage and again before re-use.
Maintenance
Maintain your tool. It is recommended that the general condition of any tool be examined before it is
used. Keep your tool in good repair by adopting a program of conscientious repair and maintenance in
accordance with recommended procedures.
Before inspection, always unplug the pump from power and allow it to cool.
This pump must be monitored frequently (at least once a month, possibly more frequently if
used in water that is full of debris).If the pump becomes overly clogged with debris (leaves,
sticks, mud, etc.), excess pressure could cause the motor seal to weaken and water could
come in contact with the electric motor. If a proper GFCL outlet is not being used, hazardous
shock could occur. NEVER STAND IN WATER WITH A RUNNING OR ELECTRICALLY-
CONNECTED PUMP!
Do not disassemble the motor housing. This pump has NO repairable internal parts, and
disassembling may cause an oil leak or dangerous electrical wiring issues.
Use only identical replacement parts.

Page 16 of 22
Parts Diagram - 50110

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Parts List - 50110
Part No.
Description
Quantity
1
Pump body
1
2
Cross recess pan head screw M5*8
2
e
Flat washer 5
4
4
Impeller
1
5
Base plate
1
6
Seal washer
2
7
Stator
1
8
Float switch component
1
9
Insourcing skeleton axis lip seals FB10 25 6
2
10
Adjusting shim
1
11
Single row centripetal ball bearing
1
12
Rotor
1
13
Single row centripetal ball bearing 6200
1
14
Wave spring D30
1
15
O-ring rubber seal 15.8*3.1
1
e
Us plug cable components
1
17
Wire clamp
1
18
Clamp sheath
1
19
Handle ring
1
20
Slotted pan head screw M8*8
1
21
Rectangle ring 15*8*2.5
1
22
Header
1
23
Socket gasket
1
24
Connector
1
25
Hexagon head screw M5*185
3
26
Spring washer 5
3
27
Cross recess pan head screw M5*16
3
e
Copper female plug
3
29
Pump barrel
1
30
Cross recess pan head screw M4*8
2
31
Capacitor clamp
1
32
Capacitor 20Uf/300v 34*55
1
33
Flexural spring
2
34
Lug plate 4.2
1
35
External teeth lock washer
1
36
Off-track
2
37
Hexagon bolt M5*115
3
38
Flat washer
3
39
cover
1

Page 18 of 22
Parts Diagram - 50131

Page 19 of 22
Parts List - 50131
Part No.
Description
Quantity
1
Pump body
1
2
Cross recess pan head screw M5*8
2
3
Flat washer
4
4
Impeller
1
5
Base plate
1
6
Seal washer
2
7
Insourcing skeleton seal
2
8
Adjusting shim
1
9
Deep grove ball bearing6201
1
10
Rotor
1
11
Deep grove ball bearing 6200
1
12
Wave spring D30
1
13
Stator
1
14
End cover
1
15
Off-track
2
16
Hexagon bolt M5*125
3
17
Capacitor 25Uf/300w
1
18
Cross recess pan head screw M4*8
2
19
Flexural spring
2
20
Flame retardant jacket
2
21
Spring washer
1
22
Cold compression
1
23
Serrated lock washers external teeth
1
24
Clamp sheath
1
25
Wire clamp
1
26
Handle ring
1
27
Slotted pan head screw M8*8
1
28
Rectangle ring
1
29
Float switch components
1
30
Us plug cable components
1
31
O ring rubber seal 15.8-3.1
e
32
Hexagon head screw
3
33
Flat washer
3
34
Tectum
1
35
Connector
1
36
Socket gasket
1
37
Cross recess pan head screw M5*16
3
38
Copper female plug
3
39
Pump case
1

Page 20 of 22
Troubleshooting
Problem
Possible Cause
Corrective Action
Pump does not start
or run
1. Blown fuse
2. Tripped breaker
3. Plug disconnected
4. Corroded plug
5. Thermal overload
6. Motor failed
1. Replace fuse
2. Reset breaker
3. Secure plug
4. Clean plug prongs
5. Disconnect the pump from
power for 30 minutes, then
reconnect
6. Contact customer service for
replacement
Pump operates but
pumps little or no
water
1. Pump screen or screen cover
blocked
2. Impeller loose on shaft
3. Impeller broken
4. Pipe or hose loose
1. Clean screen
2. Reassemble impeller
3. Contact customer service for
replacement
4. Secure pipe or hose
Replacement Parts
For replacement parts and technical questions, please call Customer Service at 1-800-222-5381.
Not all product components are available for replacement. The illustrations provided are a
convenient reference to the location and position of parts in the assembly sequence.
When ordering parts, the following will be required: Model Number, Serial Number/Lot Date Code,
and Description.
The distributor reserves the rights to make design changes and or improvements to product lines
and manuals without notice.