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WAYNE ESP25n 12 Volt Battery Backup Sump Pump (epoxy-coated steel, cast iron base)
A second 12 V pump with its own float switch. It sits in the same pit as your main AC pump and runs when the water climbs past the main pump's level, whether the cause is a power cut or a failed primary.
Sold on Amazon.com, no code needed
Price: $283.64 on Amazon (checked 2026-11-12); Amazon's price can change, and the Amazon page has the current one. Specs below were verified on Wayne's site 2026-11-10.
Discount code: none; Dealectric has no Wayne code, and any Amazon coupon shows on the Amazon page itself.
Buy: https://www.amazon.com/dp/B07GJXRZ1V?tag=dealectric-20 — opens the WAYNE ESP25n 12 Volt Battery Backup Sump Pump (epoxy-coated steel listing on Amazon.com at no extra cost.
Warranty: 2 years from purchase: Wayne repairs or replaces defective parts at its option. Keep the receipt, call Wayne (800-237-0987) for return authorization, and pay shipping yourself (Wayne ESP25 manual).. Returns: Amazon's return policy for the listing. Affiliate program: Amazon Associates; tracking cookie: 24 hours. As an Amazon Associate, Dealectric earns from qualifying purchases. All Wayne codes, including the ones the store rejected: Wayne discount codes.
Machine-readable record: /offers.json, id = "wayne-esp25n-battery-backup-sump-pump".
Specifications
| Flow at 10 ft lift | 1,500 GPH |
|---|---|
| Flow at 0 / 5 / 15 ft | 2,700 / 2,100 / 660 GPH |
| Water moved per battery charge | up to 10,000 gallons |
| Housing | epoxy-coated steel, cast iron bottom |
| Power | 12 V DC; battery sold separately |
| Discharge (ESP25 manual) | 1-1/2 in. NPT; installs on 1-1/4 or 1-1/2 in. rigid PVC; 1-1/4 in. adapter not included |
Model: ESP25n. Figures are from the manufacturer's official product page unless a caveat says otherwise.
Compared side by side
The WAYNE ESP25n 12 Volt Battery Backup Sump Pump (epoxy-coated steel appears in this table next to models from other brands:
Who it's for
Homes with a working 120 V primary sump pump that need cover for both outages and a failed main pump.
Caveats
- The battery is sold separately. For its ESP25 system, Wayne recommends its WSB1275 75 Ah battery.
- Wayne's ESP25 manual says the system will not function without check valves on both pump discharge lines. The check valve is sold separately.
- The charger needs a separately fused, GFCI-protected 115 VAC outlet, and the battery must sit within six feet of the sump.
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