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Little Giant WE20G05P4-21 Review


This Little Giant pump is designed for septic effluent, and it is not advisable to be used for any drinking water appliances. It is a heavy-duty submersible motor, and it is often applied in water fountains and ornamented fountains. You can also use it for sprinklers. Make sure that wherever you use it, there is high-pressure water.

If you are interested in the specs of this unit – it is 22 inches long (which appears to be too much for some septic tanks), 4 inches in diameter, and it has the capacity of pumping 20 gallons of water. As far as the materials are concerned, this unit is made of stainless steel, and it has a non-corrosive thermoplastic discharge. This feature is essential as some units quickly get affected by corrosion.

A definite advantage of this pump is its removable built-in check valve. In addition to this, the device is equipped with a corded electrical power source and motor brackets. Thanks to its proven PPO, this pump can endure increased performance. Reportedly, this unit can pump water at a flow rate of 20 GPM. There are special washers made of stainless steel which prevent the pump from wearing out.

As the manufacturers have taken into account the fact that this is a submersible unit, they have ensured that their product has a high-quality top bearing, which is intended for more durability. The bearing is made of hex rubber, and it has a large surface so that the unit can be more stable. There are multiple flow channels on the bearing which keep particles away from the surface.

Keep in mind that this device requires a separate float switch. Once you have this, you should plug the pump in the female side of the float switch. You don’t need a control box as you can either control it by the switch mentioned above or run it off a plug. However, it is preferable to have a control box so that you can know when there is a problem. This device can also show how many times the pump has cycled and whether it has pulled the correct current. Also, the control box allows you to manually run the pump for testing or when the float gets damaged.


Little Giant WE20G05P4-21 Submersible PumpSince the diameter of the pump is 4 inches, then you need a pipe that has a diameter of at least 5 inches in which to install the pump. You shouldn’t worry about wiring, as the unit comes pre-wired with everything necessary so that the pump can easily reach the control panel. On the whole, the installation of this device is not difficult, especially if you use it as a replacement for an existing pump.


Voltage: 115 volts

Wattage: 670 watts;

Capacity: 20 gallons

Extension length: 10 inches

Warranty and Service

Little Giant offers a 1-year warranty. If you want, you can buy an extended warranty. Remember to keep the shipping containers with the information of purchase and delivery as they will be your proof for the date of purchase in case you need to use the warranty. Whenever you have any questions related to the unit or any of its parts, you can contact the manufacturer via phone.


  • This Little Giant pump has a high-quality top bearing, which makes the unit stable and protects it from particles.
  • Thanks to its heavy-duty submersible motor, this device is very efficient in pumping water out of septic effluents.
  • Unlike similar submersible well pumps, the check-in valves of this one are removable.
  • Special stainless steel washers protect the pump from excessive wear.


  • This pump appears to be too long for some septic tanks.

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