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Black Zoeller water back up sump on a white background

Zoeller 540 FLEX Water-Powered Backup System — Model 540-0005

by Zoeller
SKU 540-0005
$ 230.25 - $ 230.25
$ 230.25
$ 230.25 - $ 230.25
$ 230.25

Zoeller 540 FLEX® Water-Powered Backup Sump System — Model 540-0005

The Zoeller 540 FLEX® is a dependable water-powered backup sump system designed to protect basements during power outages or primary pump failure. Using municipal water pressure instead of batteries, the 540 FLEX provides peace of mind with minimal maintenance and no need to replace chargers or battery cells. Ideal for homeowners who want a long-term backup solution that automatically activates when protection matters most.

Key Features

  • Powered by municipal water pressure — no batteries to replace
  • Automatically activates when primary pump fails or power is lost
  • Quiet, efficient pumping using built-in water-driven ejector
  • Helps prevent basement flooding during storms or outages
  • Tested and assembled in the USA
  • Unit requires 3/4″ inlet line to operate properly
  • 1-1/4″ suction pipe required for maximum performance (field installed)
  • Removes 2 gallons (7.6 L) per gallon (3.8 L) used
  • Flexible installation allows you to install the pump in the rafters keeping the water line safe and secure
  • No moving float rod which allows you to effectively seal the sump pit cover
  • On guard 24 hours day
  • Can be used with any existing brand of sump pump
  • Small footprint – works in 18″ x 22″ (46 x 56 cm) pit
  • 1-1/2″ Discharge Piping connection
  • Performs at operating pressures from 40 to 80 psi

Best For

  • Homes with municipal (city) water supply
  • Basements and crawl spaces with existing sump systems
  • Homeowners who want maintenance-free backup protection
  • Locations prone to storm-related power outages

Specifications

Model / SKU 540-0005
UPC 053514447113
System Type Water-Powered Sump Backup
Power Source Municipal Water Pressure (No Electricity)
Primary Use Emergency Backup for Sump Systems

 

Performance & Sizing

Backup pumping capacity depends on your municipal water pressure and plumbing size. Consult the performance chart in the spec sheet to verify GPH at your home’s water pressure.

 

Common Questions

Q: Does the 540 FLEX require electricity?
A: No. It runs off municipal water pressure and activates automatically during outages.

Q: Can it be used with well water systems?
A: No. This model is only for homes connected to a municipal water supply.

Q: Does it replace my main sump pump?
A: No — it installs as a backup to your existing primary pump.

Installation: Horizontal or vertical installation

Inlet Piping: 3/4"

Discharge: 1-1/2" piping connection

Shipping Weight: 5.5 lbs

Shipping Dimensions: Height 13 3/4 in x Width 5 1/2 in x Length 15 3/4 in.

View Spec Sheet (PDF)
View Install Manual (PDF)

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