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Little Giant WRSC-6 - User Manual

Little Giant WRSC-6
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WRSC-6 Wastewater Removal System Kits
OWNER'S MANUAL
English
EN
Wastewater Removal System Kits are designed to pump wastewater from laundry trays, washing
machines, sinks, or dehumidifiers. They are not designed to pump raw sewage, fluids other than water, or
fluids with solids. An inlet screen will remove many solids over 1/8” diameter, but large amounts of solids
can clog screen and result in pump failure.
Maximum fluid temperature is 125°F. The unit is designed to
fit under most sinks, so in many cases it is not necessary to
recess the unit into the floor. See pump manual for more
information.
This product is covered by a Limited Warranty for a period of
12 months from the date of original purchase by the
consumer. For complete warranty information, refer to www.LittleGiant.com
.
Specifications
SAFETY INSTRUCTIONS
Before Getting Started
This equipment should be installed and serviced by technically qualified personnel who are familiar with
the correct selection and use of appropriate tools, equipment, and procedures. Failure to comply with
national and local electrical and plumbing codes and within Little Giant recommendations may result in
electrical shock or fire hazard, unsatisfactory performance, or equipment failure.
Know the product’s application, limitations, and potential hazards. Read and follow instructions carefully to
avoid injury and property damage. Do not disassemble or repair unit unless described in this manual.
Failure to follow installation or operation procedures and all applicable codes may result in the following
hazards:
Model Volts HP Hertz Amps Watts Shut Off
WRSC-6
115 1/3 60 9/14.3 720 18 ft (5.5 m)
230 1/3 50/60 4.5/6.3 720 18 ft (5.5 m)
Risk of death, personal injury, or property damage due to explosion,
fire, or electric shock.
Do not use to pump flammable or explosive fluids such as gasoline, fuel oil, kerosene, etc.
Do not use in explosive atmospheres or hazardous locations as classified by the NEC, ANSI/NFPA70.
Do not handle a pump or pump motor with wet hands or when standing on a wet or damp surface, or in
water.
When a pump is in its application, do not touch the motor, pipes, or water until the unit is unplugged or
electrically disconnected.
If the power disconnect is out of sight, lock it in the open position and tag it to prevent unexpected appli-
cation of power.
If the disconnect panel is not accessible, contact the electric company to stop service.

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Questions and Answers

  • M
    Megan McdonaldAug 7, 2025
    What to do if Little Giant Water System pump runs but does not discharge liquid?
    • C
      Casey KnightAug 7, 2025
      If your Little Giant Water System pump runs but doesn't discharge liquid, it could be due to a few common issues. First, check if the check valve is installed backwards, ensuring the flow indicating arrow on the valve body points in the correct direction. The check valve might also be stuck or plugged, so remove it and inspect for proper operation. The lift might be too high for the pump, so check the rating table. Another possibility is that the inlet to the impeller is plugged; pull the pump and clean it. Lastly, the pump could be air locked; try shutting the power off for about a minute, then restart, repeating this several times. If your system includes a check valve, a 3/16” hole should be drilled in the discharge pipe approximately 2” above discharge connections.
  • P
    pbrewerAug 17, 2025
    How to troubleshoot Little Giant WRSC-6 pump not delivering rated capacity?
    • I
      Isabella GarciaAug 17, 2025
      If your Little Giant Water System pump isn't delivering its rated capacity, several factors could be responsible. Check if the lift is too high for the pump and verify the rated pump performance. Low voltage could also be the culprit, so ensure the supply voltage matches the nameplate voltage. A clogged impeller or discharge pipe can restrict flow; pull the pump and clean it, and inspect the pipe for scale or corrosion. Lastly, impeller wear due to abrasives can reduce capacity; replace the worn impeller.
  • P
    Phillip BarajasOct 28, 2025
    Why won't my Little Giant WRSC-6 pump shut off?
    • K
      Kenneth CooperOct 28, 2025
      If your Little Giant Water System pump won't shut off, it could be due to several reasons. It might be a diaphragm switch issue, in which case you should replace the switch. A weak or hardened rubber diaphragm can also cause this; consider replacing the rubber diaphragm. Another cause may be a plugged vent tube, so clear any obstructions. Dirt or sediment lodged around the rubber diaphragm can also keep the contacts closed; clean that area. The pump might be air locked; try shutting the power off for about a minute, then restart, repeating this several times. If your system has a check valve, drill a 3/16” hole in the discharge pipe about 2” above the discharge connections. If the liquid inflow matches the pump capacity, a larger pump may be needed. A defective switch can also be the probl...

Summary

Safety Instructions

Before Getting Started

Guidance on initial setup and safety precautions before operating the equipment.

Installation

Typical Installation Diagram

Illustrates the standard setup and component placement for the wastewater removal system.

Pump Location

Provides criteria for selecting the optimal placement for the pump unit.

Inlet Plumbing

Details the steps and fittings required for connecting the inlet pipe to the basin cover.

Discharge Plumbing

Outlines the process for connecting the discharge pipe, including check valve installation.

Vent Plumbing

Explains the necessity and method for venting the basin for proper switch operation.

Electrical Connections

Covers safe and correct methods for connecting the pump to the power supply.

Maintenance

Operation Testing

Instructions for verifying the pump's start and stop functionality after installation.

Cleaning the Basin Screen

Steps for removing, cleaning, and inspecting the inlet screen and its seal.

Cleaning the Basin

Procedures for cleaning the pump basin, including cover removal and reassembly.

Cleaning the Pump

Guidance on disassembling, cleaning the pump base and impeller, and reassembly.

Replacement Parts

Lists available replacement parts with their order numbers for the WRSC-6 system.

Troubleshooting

Identifies common pump problems and provides corrective actions for resolution.

Little Giant WRSC-6 Specifications

General IconGeneral
ModelWRSC-6
Horsepower1/2 HP
Voltage115V
Maximum Head25 ft
MaterialThermoplastic
Switch TypeAutomatic

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