Liberty Pumps LE50-Series User Manual

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7000 Apple Tree Avenue

Bergen, NY 14416

Phone: (800) 543-2550

Fax: (585) 494-1839

www.libertypumps.com

IMPORTANT:

Prior to installation, record Model, Serial Number, and

Code Number from pump nameplate for future reference.

MODEL ______________________

SERIAL ______________________

CODE ______________________

INSTALLATION

DATE ______________________

©Copyright 2015 Liberty Pumps Inc. All rights reserved

Contents

1.) General Information

2.) The Basin

3.) Installation

4.) Electrical Service and Operation

5.) Maintenance and Troubleshooting

6.) Warranty

Installation Manual 7034000L

LE and LEH Series Sewage Pumps

Models

LE40-Series 4/10 HP

LE50-Series 1/2 HP

LE70-Series 3/4 HP

LE100-Series 1 HP

LEH100-Series 1 HP

LEH150-Series 1.5 HP

LEH200-Series 2 HP

*Do not throw away or lose this manual.

Questions and Answers:

J
James SmithAug 9, 2025
How to fix a Liberty Pumps LE50 that will not run?
- J
  John RobertsAug 9, 2025
  If your Liberty Pumps Water Pump isn't running, there are several potential causes. First, ensure the unit is securely plugged in and have an electrician inspect the wiring for proper connections, voltage, and capacity. Another cause may be that the switch is obstructed; reposition the pump or switch for adequate clearance. Also, the liquid level might be insufficient, so ensure it rises enough to activate the switch. Finally, the switch itself may be defective, in which case you should remove and replace it.
D
davissheilaAug 15, 2025
What to do if my Liberty Pumps LE50 runs but doesn't pump?
- B
  Brian JohnsonAug 15, 2025
  If your Liberty Pumps Water Pump runs or hums but doesn't pump water, start by checking the discharge line for any blockages, including foreign material or ice. Next, examine the check valve to ensure it's not stuck closed or installed backward. Also, verify that any gate or ball valves are open. If the total lift is beyond the pump's capability, try routing the piping to a lower level or consider a larger pump. Lastly, the pump impeller might be jammed or the volute casing plugged; remove the pump, detach the base, clean around the impeller, then reassemble and reinstall.
B
bradleypeterAug 20, 2025
Why won't my Liberty Pumps LE50 turn off?
- X
  xsteeleAug 20, 2025
  If your Liberty Pumps Water Pump won't turn off, it could be due to a couple of reasons. First, the switch might be obstructed, preventing it from moving to the 'turn off' position; reposition the pump or switch to ensure it has adequate clearance. Alternatively, the switch itself may be defective, requiring you to remove and replace it.
J
Jordan HughesAug 27, 2025
How to reduce noise from a Liberty Pumps LE50 Water Pump?
- A
  Andrew BlackAug 27, 2025
  If your Liberty Pumps Water Pump is operating noisily, there are several potential causes. Start by removing the pump from the basin, detaching the pump base, and cleaning the area around the impeller to remove any foreign objects. Also, piping attachments to the building may be too rigid, so replace a portion of the discharge line with a rubber hose or connector.
S
Sean HansenSep 1, 2025
Why does my Liberty Pumps Water Pump run intermittently when no fixtures are being used?
- D
  dfranklinSep 1, 2025
  If your Liberty Pumps Water Pump runs periodically when fixtures aren't in use, it could be due to a check valve issue or leaking fixtures. Examine the check valve to ensure it was installed, isn't stuck open, and isn't leaking. Also, repair any leaking fixtures to eliminate the unwanted water flow.

Liberty Pumps LE50-Series Specifications

General

Brand	Liberty Pumps
Model	LE50-Series
Category	Water Pump
Language	English

Summary

General Information

The Basin

Excavation

Prepare excavation site with proper bedding for basin placement.

Inlet Connection & Initial Backfill

Connect inlet and backfill around the basin base with suitable material.

Final Backfill

Complete backfill with recommended material, avoiding rocks and foreign objects.

Installation of the Pump

Simplex (One Pump) Systems

Install single pump system, ensuring float clearance and proper discharge connection.

Duplex (Two Pump) Systems

Install dual pump system, managing floats and discharge lines for optimal operation.

Installation of Remaining Discharge (Simplex)

Connect remaining discharge line for simplex systems, including vent and check valves.

Installation of Remaining Discharge (Duplex)

Connect remaining discharge lines for duplex systems, ensuring proper venting and check valves.

Electrical Service & Operation

Maintenance and Troubleshooting

3 Year Limited Warranty

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