Zoeller 540 FLEX Water-Powered Backup Sump Pump System – No Battery or Electricity Required – Installs Horizontally or Vertically – Works During Sump Pump Failure – ¾″ Inlet / 1-½″ Discharge

Price: $225.57
(as of Feb 09, 2026 22:08:11 UTC – Details)

From the brand

Shop Zoeller Sump Pumps

Shop Zoeller Sewage Pumps

Shop Pump Packages and Backups

Shop Accessories

Ultimate Backup Protection During Power Failures – This water-powered backup pump kicks in when your primary sump pump fails or when a blackout hits, keeping your basement dry without relying on batteries or electricity
High Efficiency Water-Driven Design – Utilizes municipal water pressure (40-80 psi) to drive removal of up to 2 gallons of sump water for every 1 gallon of supply water used
Flexible Installation – Horizontal or Vertical – Fits small sump pits (as small as 18″ × 22″) and can be mounted overhead or in the ceiling joists to keep the line safe and secure
Works with Any Brand of Primary Pump – Designed as a seamless backup system, the 540 FLEX can integrate with your existing sump pump setup and activates automatically when needed
Durable Construction & Peace of Mind Warranty – Made of non-corrosive materials, includes a 3-year limited warranty from Zoeller, and designed for reliable standby use even in tough conditions