Liberty Pumps Model 287 1/2 HP Submersible Sump Pump

With a shut-off head of 37 feet and 3/4" solids-handling capability, the 280-series by Liberty covers a wide-range of low-head to mid-range pump applications.  Designed for STEP systems, mound systems, liquid waste transfer and high output sump applications, you can count on the 280-series to offer superior performance.  Designed with Liberty's unique one-piece cast iron body and quick-disconnect cords available in 10' and 25' lengths.

The Liberty 280 series provides a cost effective "midrange" pump for on-site waste water systems, liquid waste transfer and commercial heavy-duty sump pump applications that require higher head or more flow. Designed around Liberty's unique "Uni-Body" casting, the 280-Series will provide years of reliable performance.

Liberty Pumps Model 287 Features:

• Vortex style impeller, permitting passage of solids up to 3/4"
• 416 stainless steel rotor shaft
• Permanently lubricated upper sleeve bearing and lower ball bearing
• Carbon and ceramic mechanical face seal
• Epoxy powder coat finish
• All fasteners - corrosion-resistant stainless steel
• 1-1/2" Discharge
• Stainless steel bottom screen - easily removable
• Quick-disconnect 10' standard power cord allows replacement of cord in seconds without breaking seals to motor. (25' length optional) For 25' cord option, add a "-2" suffix to model number. Example: 283-2 for Model 283 with 25' cord.
• Maximum fluid temperature: 140° F

Liberty Pumps Model 287 Motor Specifications:

• 1⁄2 hp
• 60 Hz
• 3450 RPM
• Oil filled, thermally protected
• 115V (287) or 208-230V (287HV)
• 115 V. Models (287) - 10 amps
• 208/230 V. Models (287HV) - 5 amps

Liberty Pumps Model 287 Dimensional Data:

• Weight: 29 lbs.
• Height: 13"
• Major Width: 10"
• Minimum Sump Diameters: 10"

Liberty Pumps Model 287 Performance Curve:

Liberty Pumps Model 287 Additional Documentation:

Specification Documentation
Install Manual (English)
Install Manual (French)
Install Manual (Spanish)

What is VMF?

What is VMF?

VMF (Vertical Magnet Float) Switch is very reliable design sump pump switch by Liberty Pumps. Ansd as the name implys and  by design the VMF employes a magnet along with a small but bouyant float to accomplish it's task. The VMF switch only moves up and down, it requires much less room to turn the pump on and off than other types of pumps with other types of switches like those that are built into float balls teathered to the power cords, or pressure diaphrams.

When installed on the Liberty 287 Series Subermisible Sump Pump the VMF Switch provides a much smaller footprint and allows for the use of a smaller (10")  diameter Sump Pit instead of a 14" diameter which is normal minimum clearance for a "sump pit' or basin, this can be very benificial as many sump pump pits are areay designed undersized*, so this sump pum may be placed in a smaller catch basin to pump out water than most other sump pumps of similar power.

*Sump Pit – All Models

1. A sump pit not less than 14” in diameter is recommended. On submersible pumps equipped with the vertical float (models 237 and 247) a minimum 10” diameter pit is acceptable. A larger diameter pit is preferred as it allows for longer pump cycling and reduced switch cycling. The depth of the pit should be at least 12”. If using Liberty’s platform product called “The Brick” then the depth of the pit should be at least 15”.
2. If the pit is not already enclosed on the bottom, provide a hard level bottom of bricks or concrete. DO NOT place the pump directly on earth, gravel or debris since this can cause excessive wear of the impeller and possible jamming. “The Brick” (sold by Liberty Pumps as part # 4445000) is a pre-molded stable platform designed to fit your submersible pump. It raises the pump 2.5” off the bottom of the pit, reducing the potential for jamming from rocks and debris. Contact your local distributor to order. Remove all debris from the bottom of the sump pit before installation of the pump. A sump pit cover is suggested for safety and to prevent foreign objects from entering the pit.