Our verdict
Pick the ESP25n for the current design: a coated steel and cast iron pump, a battery case with LED display and alarm, and up to 10,000 gallons per charge on Wayne's recommended battery. The original ESP25 is thermoplastic and still a capable backup if priced lower.
The central trade-off
Build. Thermoplastic ESP25 against coated steel and cast iron ESP25n.
Flow. Wayne rates the ESP25 at 2,300 GPH at 10 ft and the ESP25n at 1,680 GPH at 10 ft.
Battery. Neither includes the battery.
Side by side
| Specification | Wayne ESP25 Battery Backup System | Wayne ESP25n Battery Backup Sump Pump |
|---|---|---|
| Max flow (maker) | Not stated by the maker | 45 GPM |
| Max head (maker) | 20 ft | 15 ft |
| Runtime (maker) | Not stated by the maker | 10,000 gallons |
| Alarm | Not stated by the maker | audible alarm |
| Voltage | 12 v | 12 V DC |
| Housing | thermoplastic | Coated Steel, Thermoplastic |
| Weight | 12.9 lb | 13.5 lb |
| Warranty | 2 Years - Parts Only | 2 Year Limited |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.
Which should you choose?
Choose the Wayne ESP25 Battery Backup System if
- You find it at a lower price
- You want a thermoplastic pump
Choose the Wayne ESP25n Battery Backup Sump Pump if
- You want the newer design
- You want the LED display