Why it matters
The ESP25n's 12 V motor moves 2,700 GPH (45 GPM) at 0 ft and 1,680 GPH (28 GPM) at 10 ft, per Wayne. Coated steel and cast iron construction suits the sump environment, and top suction helps prevent clogs and air lock without a weep hole.
A reed float switch turns it on, and the battery case has an LED display and audible alarm. Wayne says it can move up to 10,000 gallons on one charge of its recommended WSB1275 battery.
Who it's for, and who should skip it
Good fit if
- Adding backup to an existing pump
- Lifts up to about 10 ft
- Owners who want a sturdy build
Look elsewhere if
- Owners who won't maintain a battery
- No-battery backup
Pros and cons
Pros
- Steel and cast iron
- Top suction
- Alarm and LED display
Cons
- Battery extra
- 2-year warranty
- Flow drops at height
Limitations to weigh
- Battery backups need a separate 12 V deep-cycle battery unless one is included; check the battery's age every year.
- Fit a check valve on the discharge so water in the pipe doesn't fall back into the pit after each cycle.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Material | Coated Steel, Thermoplastic | Retailer |
|---|---|---|
| Dimensions (seller) | 17"L x 10.5"W x 14"H | Retailer |
| Product weight | 13.5 lb | Retailer |
| Max flow (maker) | 45 GPM | Retailer |
| Max head / lift (maker) | 15 ft | Retailer |
| Voltage | 12 V DC | Retailer |
| Model number | ESP25n | Retailer |
| Warranty | 2 Year Limited | Retailer |
| Housing | Cast Iron | Retailer |
| Backup runtime (maker) | 10,000 gallons | Retailer |
| Alarm | audible alarm | Retailer |
Alternatives worth comparing
More backup sump pumps we cover
- Basement Watchdog CITS-50 Combo System
- Wayne WSS30VN Primary and Battery Backup Combo
- Liberty Pumps PC257-442 Combo
- Pumps-A-Lot WP25 Water-Powered Pump
All backup sump pumps, compared in one table · Every Wayne product we cover
Final verdict
A sturdy backup with clear performance figures.
Where to buy
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