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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

Table of Contents

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Preview: Installation Manual
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.

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

Liberty Pumps 404 Specifications

General IconGeneral
TypeSubmersible Sump Pump
Horsepower1/3 HP
Voltage115V
Maximum Head25 ft
Motor Housing MaterialCast Iron
MaterialCast Iron
Phase1
Float Switch IncludedYes
Discharge Size1-1/2 inch
Cord Length10 ft
Impeller MaterialThermoplastic

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