Liberty 331, 1/2 HP Portable Aluminum Transfer Pump (Garden Hose Connection) 115v 20 ft Cord

SKU #: 331
Brand: Liberty
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Liberty Pump 331 Portable Transfer Pump

Liberty is a pioneer in the wastewater industry, having introduced many innovative product lines, such as the Liberty Pump 331.  Liberty Pump 331 is a convenient, easy-to-use transfer pump for moving water from one location to another and can be used to effectively boost water pressure, drain hot water tanks and general water transfer.  This pump is a heavy-duty portable transfer pump with a 1/2 HP motor.  The Liberty Pump 331 delivers up to 40 lbs. of pressure and has a maximum head of 105’. Maximum vertical suction lift is 15’.     


  • Garden Hose Adapter and Suction Screen


  • ½ HP
  • 115 Voltage
  • 8 Amps
  • 7500 RPM
  • Flow at 5FT Head: 23 GPM
  • Shutoff Head: 105
  • Maximum fluid temperature: 135℉
  • Height: 7”
  • Width: 4-½”
  • Length: 9-¾”
  • Weight 10-½ LBS
  • Powerful ½ HP motor capable of pumping to over 100 feet of head
  • Has automatic shut off feature
  • Thermally Protected
  • 20’ power cord
  • One-piece cast aluminum pump and motor housing with integral carry handle
  • Durable epoxy powder coat finish
  • Convenient On/Off switch
  • 3/4" brass garden hose connectors
  • Glass reinforced thermoplastic impeller
  • Permanently lubricated ball bearings
  • Large prime plug with internal funnel design for easy priming
  • Easily replaced motor brushes
  • Garden hose connection
  • Heavy-duty portable transfer pump
  • CSA Certified: CSA 22.2 No. 108
  • Note From The Manufacture: The Liberty Pump 331 is not intended for use in wet or damp areas.  The motor is not submersible. Not intended to pump chemicals or flammable liquids.  Motor brushes require replacement approximately every 300 hours of use. Not intended for permanent installations.

Examples of applications for this heavy-duty portable transfer pump include:

  • General water transfer
  • Pool cover drainage
  • Filling livestock tanks
  • Draining water heaters
  • Boosting Water Pressure by 40 lbs.
  • Charging Hydronic Floor Systems with Glycol

Note:  Image is illustrative and may not reflect details of actual product. 

Please see the manuals for specifications on this item

Welcome to Inspector Pumphead’s recommendations! I’ll be highlighting specific pump models and explaining the applications, features and benefits. The pump featured here might be a best-seller, be seasonally appropriate or have unique features that set it apart from other pumps of the same type.  Today the highlighted pump will be the Liberty Pump 331, a heavy duty portable transfer pump from one of our favorite manufacturers Liberty Pumps. Watch the product highlight video here:

Transfer Pumps

The humble transfer pump serves perhaps the most basic and critical function of any pumping mechanism: it transfers fluid from one place to another. It’s a straightforward task, but one that must be performed frequently whether you’re a homeowner, property manager or contractor. Flooding and excess water runoff are a fact of life and a transfer pump is a handy tool to deal with such obstacles. Because of the broad application uses, transfer pumps come in a variety of designs and configurations. The Liberty Pump 331 is our best-selling transfer pump. What makes it so popular? Performance and Versatility

With a ½ HP motor, the Liberty Pump 331 can handle multiple types of heavy duty water transfer. It can deliver up to 40 lbs. of nozzle pressure, reach a high maximum head of 105 ft. and can support a maximum vertical suction lift of 15 ft. Probably the most common use is to de-water flooded basements or other flood prone areas. Another frequent (and with summer coming up, relevant) use is to remove the accumulated water off of pool covers. People also often use transfer pumps to drain water heaters. Keep in mind that these pumps don’t just necessarily evacuate water but can also be used to direct water to a specific source such as livestock tank or water storage tank. The pump can also be used to boost water pressure. To help the pump perform these functions, brass male and female adapters are included with the pump. A plastic male hose strainer is included as well and should always be used when pumping from a pond, stream or any body of water that may include foreign objects that could potentially clog the pump.  Portability Unlike a submersible pump or any other pump that is installed in a fixed system, the Liberty Pump 331 is portable, making it the ideal transfer pump to tackle unexpected (or unplanned) water transfer applications on a day-to-day basis. You can take it down to your basement one day and up to your pool the next. To that end, has a built-in top handle for convenient transport. The Liberty Pump 331 is also lightweight (approximately 11 lbs.) and compact, (9 ¾” by 4 ½” by 7”) making it ideal for use in tight or tough to reach spots. Warranty A 2 year warranty serviced by Liberty is included with this pump, as opposed to the typical 1 year term. Liberty is widely regarded as one of the best manufacturers as far as communication, so if there are any issues you can rest assured that they will be dealt with extreme care and speed. Pump Products application engineers are standing by to provide technical assistance, price quotes or to answer any questions you may have regarding pumps. Call our toll free number 1-800-429-0800.

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*Note: Picture is illustrative and may not reflect the actual product.*