Liberty Pumps Model 457 Submersible Sump Pump 1/2 HP w/ VMF

Overview:

• 1/2 hp
• 1-1/2" Discharge
• 3/8" Solids Handling

Cool running and efficient, the 450-Series features a deep-finned powder coated aluminum motor housing, polypropylene base and vortex style impeller. Topped-off with a quick-disconnect power cord and Liberty's patented VMF switch (model 457) the 450-Series offers a superior value in a 1/2 hp pump.

Specifications of the Liberty 450-Series Submersible Sump Pumps

Liberty Pumps Model 457 Submersible Sump Pump Features:

• Vortex style impeller permits passage of solids without clogging. Made of high temp engineered thermoplastic.
• Polypropylene and powder coated aluminum construction.
• Stainless steel rotor shaft.
• All fasteners - non-corrosive stainless steel.
• Oil-filled, hermetically sealed motors with thermal overload protection.
• Permanently lubricated upper and lower bearings.
• Unitized shaft seal.
• 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: 451-2 for Model 451 with 25' cord
• Removable base allows suction down to 1/8"
• 2YEAR LIMITED WARRANTY

Liberty Pumps Model 457 Submersible Sump Pump  - Motor Specifications:

• 1/2 HP
• 60Hz
• 115V
• 3450 RPM
• 7.5a Oil Filled; Thermally Protected

Dimensional Data 450-Series Liberty Pumps - Subermisible Sump Pumps:

• Weight ----- 12.5 LBS.
• Height ----- 12.5"
• Major Width ----- 9.6"
• Minimum Sump Diameter ----- 14" (10" on Model 457)

Here are the pump Models in Liberty's 450 Series 1/2 Horse Power Sump Pump Line-up:

• Model 450 - Manual - no switch
• Model 451 - Quick Disconnect - Wide Angle Float Switch
• Model 453 - Wide Angle Float Switch with seies plug, allows for manual operation of pump.
• Model 457 VMF - Vertical Magnetic Float Switch Designed for smaller pits, down to 10 inch diameter. (The pump the this web page is about)

Liberty Pumps Model 457 Submersible Sump Pump Additional Documentation:

Specification Sheet
Installation Manual
► 2 Year Limited Warranty Information Page

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 #450 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.