Little Giant WRS-6 Drainosaur Under Sink Sump System
- 2760 GPH at 5 ft lift, 18 ft shut-off
- 5-gallon basin with built-in pump
- Diaphragm switch: on at 7 to 10 in, off at 1 to 4 in
- 1/3 HP, 115V, 9 A, 720 W
- Check valve and union not included
- 10.63 x 10.63 x 16.17 in, 10 ft cord
- Limited one-year warranty
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A tidy plug-in drain system for sinks, laundry trays and appliances below gravity drainage.
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ASIN: B0018LD5T8Model: Drainosaur WRS-6Category: Sump Pumps
Overview
Not a basement pit pump, this Little Giant system pairs a small automatic sump pump with its own basin for placement under a sink or beside a laundry tray. Drain water flows in from fixtures and appliances, and a built-in diaphragm switch pumps it out when the level rises.
Little Giant solves drainage where gravity drainage is impractical, such as a basement bar sink or laundry tray, with a preassembled tank and pump.
Who it's for
Homeowners adding a basement laundry sink, wet bar or dehumidifier drain below the sewer line get a ready-made lift system. Anyone needing to drain a flooding basement floor should use a dedicated pit sump pump.
Pros and cons
- Preassembled tank and pump
- Automatic diaphragm switch
- Removable filter in the cover
- Thermal overload protection
- Check valve and union not included
- Listing conflicts on discharge pipe
- Short basic warranty
Performance notes
The diaphragm switch senses water depth inside the basin, starting the pump near the top and stopping it near the bottom, so the tank empties in short cycles. Output falls as lift height increases, reaching shut-off at the listed head. Thermal overload protection guards the motor.
Specifications
| Brand | Little Giant |
|---|---|
| Model | Drainosaur WRS-6 |
| Dimensions & fit | |
| Maximum Lifting Height | 18 ft shut-off |
| Item Dimensions L X W X H | 10.63 x 10.63 x 16.17 inches |
| Cord length | 10 ft |
| Item weight | 26.5 lb |
| Item Weight | 26.5 pounds |
| Capacity & performance | |
| Flow Rate | 2760 GPH at 5 ft lift (46 gpm) |
| Wattage | 720 watts |
| Power & efficiency | |
| Horsepower | 1/3 HP |
| Voltage | 115 volts, 60 Hz |
| Power Source | Corded Electric |
| Construction & materials | |
| Material Type | Cast iron pump, polypropylene basin |
| Color | Black and blue |
| Included components | |
| Included Components | Pump with diaphragm switch, basin, 2 x 1-1/2 in MNPT x 2 in slip adapters, 2 in MNPT x 1-1/2 in vent adapter, O-rings, cover filter, installation manual |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | Limited one-year |
| Other details | |
| Product Style | Under-sink sump system, 5-gallon basin |
| Running current | 9 A |
| Switch type | Integral diaphragm, on at 7 to 10 in, off at 1 to 4 in |
| Pressure | 7.8 PSI |
| Connections | 1-1/2 in inlet and discharge, 2 in vent |
Frequently asked questions
What comes with the Little Giant WRS-6?
The 1/3 HP pump with built-in diaphragm switch and 10' cord, the 5-gallon basin, two 1-1/2 in MNPT x 2 in slip adapters, one 2 in MNPT x 1-1/2 in slip adapter for the vent, O-rings, a removable cover filter and an installation manual.
What can drain into the Little Giant Drainosaur?
Laundry trays and sinks, lavatories, wet bar sinks, dehumidifiers, air conditioners, water softeners and more.
Does the Little Giant WRS-6 basin need a vent?
The basin has a 2 in vent connection, and an adapter for it is included.