Liberty Pumps 404 User Manual

Liberty Pumps 404

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Installation Manual

7000 Apple Tree Avenue

Bergen, NY 14416

ph: 800-543-2550

fax: 585-494-1839

www.libertypumps.com

Copyright © Liberty Pumps, Inc. 2019

All rights reserved.

7212000F

All Units Contain

Certified Pump

Meets UPC

404CV Models Only

ASME A112.3.4

CSA B45.9

Automatic Drain Pumps

Models

404

1/3 hp Residential 115V

404

404/A

•with Alarm

404/A-EYE

•with NightEye® Alarm

404CV

• with Check Valve

404CV/A

• with Check Valve and Alarm

404CV/A-EYE

• with Check Valve and NightEye® Alarm

404L

•with Larger Ports

404L/A

• with Larger Ports and Alarm

404L/A-EYE

• with Larger Ports and NightEye® Alarm

405

1/2 hp Commercial High Temp 115V

405

405HV

• High Voltage 230V

405/A

•with Alarm

405/A-EYE

•with NightEye® Alarm

Other manuals for Liberty Pumps 404

Installation Manual18 pages

Questions and Answers:

B
Barry JacksonJul 27, 2025
How to troubleshoot a Liberty Pumps 404 that won't turn on or off?
- K
  kiara86Jul 27, 2025
  If your Liberty Pumps Water Pump isn't turning on or shutting off, first, ensure the unit is securely plugged in. Then, have an electrician inspect the wiring to confirm proper connections and sufficient capacity. Also, make sure that an unrestricted vent of at least 1-¼” in diameter is in use. Finally, remove the access cover and check that the float is free to move. If buildup restricts the float, clean and reinstall it. If the switch is defective, replace it.
C
Cynthia WebbAug 2, 2025
What to do if my Liberty Pumps Water Pump runs but does not pump?
- D
  Donald HigginsAug 2, 2025
  If your Liberty Pumps Water Pump runs or hums but doesn't pump, start by checking the discharge line for any blockages, including ice if the line runs through cold areas. Next, remove the check valve and inspect it to ensure it operates freely and is installed correctly. Also, check the trap and inlet piping for restrictions. If the total lift height has been reached, try routing the pipe to a lower level, or consider adding another pumping station at roughly half the total lift. Lastly, disassemble the receiver and bottom base of the pump to remove any foreign material jamming the impeller, then reassemble.
M
michael55Aug 8, 2025
Why is water or soap suds coming out of the vent pipe of my Liberty Pumps 404?
- T
  Terry PerezAug 8, 2025
  If water or soap suds are coming out of the vent pipe of your Liberty Pumps Water Pump, ensure that an unrestricted vent of at least 1- ¼” in diameter is in use. Remove the tank cover and check that the float is free to move; if buildup restricts it, clean and reinstall. If the switch is defective, replace it. Also, try using a valve on the inlet to reduce the rate of inflow if it exceeds the pump output.
K
Kimberly NelsonAug 14, 2025
Why is my Liberty Pumps 404 short-cycling?
- R
  Rita RobinsonAug 15, 2025
  If your Liberty Pumps Water Pump is short-cycling, ensure that an unrestricted vent of at least 1-¼” in diameter is in use. Remove the access cover and check that the float is free to move; if buildup restricts it, clean and reinstall. If the switch is defective, replace it. Also, remove the check valve and examine it to ensure it operates freely and is installed correctly.
T
timothyhayesAug 20, 2025
How to reduce noise from a Liberty Pumps 404?
- S
  Stephanie ShieldsAug 20, 2025
  If your Liberty Pumps Water Pump is operating noisily, disassemble the receiver and bottom base of the pump to remove any foreign material from the impeller cavity, then reassemble. Also, replace a portion of the discharge pipe with a rubber hose to absorb noise if the piping to the house structure is too rigid.

Liberty Pumps 404 Specifications

General

Type	Submersible Sump Pump
Horsepower	1/3 HP
Voltage	115V
Maximum Head	25 ft
Motor Housing Material	Cast Iron
Material	Cast Iron
Phase	1
Float Switch Included	Yes
Discharge Size	1-1/2 inch
Cord Length	10 ft
Impeller Material	Thermoplastic

Summary

Safety Precautions

Electrical Safety Hazards

Details electrical hazards and precautions to prevent serious injury or death from shock.

Fire Safety Hazards

Outlines fire hazards associated with the pump and installation, including extension cord use.

General Safety Warnings

Covers general safety warnings for installation, modification, and operation to prevent harm.

Important Notices and Warnings

Provides important instructions related to pump operation and property damage prevention.

Product Dimensions

Pump Installation Guide

Inlet and Vent Piping

Guidance on connecting fixtures to pump inlet/vent ports, including trap requirements.

Discharge Piping and Check Valve

Instructions for discharge piping, union installation, and check valve usage for specific models.

CV Model Check Valve Requirements

Specifies check valve requirements for 404/CV, 404CV/A, and 404CV/A-EYE models.

Pump Application and Use

Ventilation System

Alarm Unit Air Vent Hole

Procedure for drilling an air vent hole to prevent air pockets and ensure alarm float activation.

Power Cord Specifications

Alarm System Operation

Pump Operation Modes

Automatic Pump Cycling

Details connecting the float switch and pump motor for automatic cycling.

Manual Pump Control

Explains how to bypass the float switch for manual pump control or in case of failure.

Maintenance and Troubleshooting Guide

Routine Maintenance Tasks

Guidance on periodic cleaning of traps and checking discharge check valves.

Float Switch Checks

Instructions for removing and checking the float switch for proper operation and tether length.

Liberty Pumps Warranty

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