Liberty 331 Portable Transfer Pump | 1/2 Hp | 120V

Compact 1/2 HP Portable Transfer Pump for Water Transfer, Pressure Boosting & Tank Draining

The Liberty 331 Portable Transfer Pump is a rugged, easy-to-use utility pump designed for fast, efficient water transfer in residential, agricultural, and light commercial applications. Powered by a 1/2 HP thermally protected motor, this pump delivers up to 105 feet of discharge head, boosts water pressure up to 40 PSI, and provides a maximum suction lift of 15 feet, making it a versatile tool for a wide range of temporary pumping needs.

Built with a one-piece cast aluminum pump and motor housing, the Liberty 331 includes an integrated carry handle, making it exceptionally portable for jobsite, shop, or field use. The pump features 3/4" brass garden hose connectors, a 20-foot power cord, and a convenient On/Off switch for operator control.

Its large prime plug with an internal funnel design allows for quick, mess-free priming. A glass-reinforced thermoplastic impeller, permanently lubricated bearings, and a durable epoxy powder-coat finish ensure long service life with minimal maintenance. Motor brushes are easily replaceable after long periods of use.

Typical applications include:

• General water transfer

• Hot water tank draining

• Charging hydronic heating systems with glycol

• Pool cover drainage

• Filling livestock tanks

• Temporary pressure boosting

Not intended for permanent installation or for pumping chemicals, flammable liquids, or use in wet/damp locations. The pump is not submersible.

Features of the Liberty 331 Portable Transfer Pump

• 1/2 HP, 115V, 8A motor with thermal overload protection

• Delivers up to 40 PSI and 105 ft of maximum discharge head

• One-piece cast aluminum housing with built-in carry handle

• Glass reinforced thermoplastic impeller for durability

• Large priming plug with internal funnel for easy priming

• 20 ft power cord for extended reach

• 3/4" brass garden hose connectors (inlet and outlet)

• Permanently lubricated ball bearings

• Replaceable motor brushes (~300 hours service life)

• Maximum suction lift: 15 ft

• Maximum fluid temperature: 135°F

• Weight: 10.5 lbs

• Not submersible and not for chemicals or flammable liquids

• 3-year limited warranty

Frequently Asked Questions (FAQs)

What is the Liberty 331 designed for?

It is ideal for temporary water transfer, pressure boosting, draining hot water tanks, pool cover drainage, charging heating systems, and filling livestock tanks.

Can this pump be used for permanent installation?

No. The Liberty 331 is intended for portable, temporary use only.

What hoses does the pump accept?

The pump uses standard 3/4" garden hose connections (brass fittings supplied).

Can the pump be used in wet or damp locations?

No. The motor is not submersible and must be kept in a dry environment during operation.

Can it pump chemicals or flammable liquids?

No. The pump is designed only for water and is not rated for chemicals, petroleum products, or flammable fluids.

How much pressure can the Liberty 331 generate?

It can boost water pressure up to 40 PSI and pump up to 105 feet of head.

What is the maximum suction lift?

The pump can lift water up to 15 feet vertically on the suction side.

What maintenance is required?

The motor brushes should be replaced every ~300 hours of operation. Bearings are permanently lubricated and require no service.

Is priming required?

Yes. The pump must be primed before use. The large priming plug with internal funnel design makes this quick and easy.

What is the motor specification?

• 1/2 HP

• 115V

• 8 amps

• 60 Hz

• 7500 RPM

• Thermally protected

What is the warranty?

The Liberty 331 comes with a 3-year limited warranty from Liberty Pumps.