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Little Giant WRS-5 - User Manual

Little Giant WRS-5
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WRS-5 Wastewater Removal System Kits
OWNER'S MANUAL
English
EN
Wastewater Removal System Kits are designed to pump waste-
water from laundry trays, washing machines, sinks, or dehumidi-
fiers. 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
WRS-5 115 1/6 60 5/6.4 380 21 ft (6.4 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 electri-
cally disconnected.
If the power disconnect is out of sight, lock it in the open position and tag it to prevent unexpected application of
power.
If the disconnect panel is not accessible, contact the electric company to stop service.

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Questions and Answers

  • C
    Cynthia DoughertyAug 5, 2025
    What to do if my Little Giant WRS-5 Water Pump runs but does not discharge liquid?
    • T
      Travis VaughnAug 5, 2025
      If your Little Giant Water Pump runs but doesn't discharge liquid, consider these potential causes: * The check valve might be installed backwards. Ensure the flow indicating arrow on the check valve body points in the correct direction. * The check valve could be stuck or plugged. Remove it and inspect its operation. * The lift might be too high for the pump. Check the rating table. * The inlet to the impeller could be plugged. Pull the pump and clean it. * The pump could be air locked. Try shutting the power off for about a minute, then restart. Repeat this several times. If your system includes a check valve, a 3/16” hole should be drilled in the discharge pipe approximately 2” above the discharge connections.
  • T
    Travis PittmanAug 13, 2025
    What to do if Little Giant WRS-5 runs but does not discharge liquid?
    • V
      Veronica MaciasAug 13, 2025
      If your Little Giant Water Pump runs but doesn't discharge liquid, there are several possible reasons. The check valve might be installed backward; ensure the flow indicating arrow on the check valve body is properly oriented. The check valve could also be stuck or plugged, so remove it and inspect its operation. The lift might be too high for the pump, so check the rating table. Another cause could be a plugged inlet to the impeller, in which case you should pull the pump and clean it. Lastly, the pump might be air-locked. To resolve this, shut the power off for about 1 minute and then restart; repeat this several times to clear any air from the pump. If your system has a check valve, drill a 3/16-inch hole in the discharge pipe approximately 2 inches above the discharge connections.
  • K
    kendraortizAug 20, 2025
    Why Little Giant WRS-5 Water Pump does not deliver rated capacity?
    • D
      daniel34Aug 20, 2025
      If your Little Giant Water Pump isn't delivering its rated capacity, several factors could be responsible. The lift might be too high for the pump, so check the rated pump performance. Low voltage causing a slow speed could also be the issue; ensure the supply voltage corresponds to the nameplate voltage. A clogged impeller or discharge pipe could be restricting flow; pull the pump and clean it, and check the pipe for scale or corrosion. Finally, impeller wear due to abrasives could reduce capacity, requiring you to replace the worn impeller.
  • W
    Wendy Sandoval MDNov 26, 2025
    Why won't my Little Giant WRS-5 Water Pump shut off?
    • H
      Heather MoranNov 26, 2025
      Several issues can cause a Little Giant Water Pump to not shut off: * A faulty diaphragm switch may need replacement. * A weak or hardened rubber diaphragm may need replacement. * A plugged vent tube may need clearing of obstructions. * Dirt or sediment lodged between the retainer ring and rubber diaphragm may require cleaning. * The pump might be air locked, requiring you to shut the power off for about a minute, then restart. Repeat 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's capacity, a larger pump is required. * A defective switch may need checking with an ohmmeter (open-infinite resistance, closed-zero). * A loose connection in the lev...

Summary

Safety Instructions

Before Getting Started

Guidance for qualified personnel before installing or servicing equipment, including potential hazards.

Installation

Typical Installation Overview

Visual guide and instructions for a standard installation setup of the wastewater removal system.

Pump Location and Plumbing

Guidelines for positioning the pump and connecting inlet and discharge pipes to the basin.

Vent Plumbing and Electrical Connections

Instructions for proper vent plumbing and safe electrical hookups for the pump system.

Maintenance and Troubleshooting

Operation Testing

Steps to verify the pump's operational functionality after installation.

Cleaning Procedures

Detailed steps for cleaning the basin screen, basin, and pump components.

Replacement Parts

List of pump components with order numbers for replacement.

Troubleshooting Common Issues

Diagnosing and resolving typical problems encountered with the pump operation.

Little Giant WRS-5 Specifications

General IconGeneral
BrandLittle Giant
ModelWRS-5
CategoryWater Pump
LanguageEnglish

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