Sump pump battery backup installation
A battery backup sump pump is a second pump, with its own float and battery, that takes over when power fails or the main pump can't keep up. It matters most when storms knock out power at the same time the pit is filling.
The highest-risk moment for a basement or crawl space with a sump is a storm that cuts power. The primary pump stops just as water arrives.
Backup systems add a 12-volt pump alongside the main one, with a charger and battery. Battery life and run time depend on the battery and how often the pump cycles.
Signs you need sump pump battery backup
- A sump that runs during storms
- Power outages in your area during heavy rain
- A finished basement
- An older primary pump
How sump pump battery backup is done
- 1
Assess
Check the pit size, discharge and primary pump.
- 2
Install
Install the backup pump, check valve, float, charger and battery.
- 3
Test
Simulate a power failure and confirm the backup runs and alarms.
What affects the cost of sump pump battery backup
- Backup system and battery capacity
- Pit space
- Discharge piping changes
Ask for the trip fee and the total price before work starts.
Need sump pump battery backup? Call now
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Sump pump battery backup: common questions
How long does a sump pump battery last?
Run time depends on battery size and how often the pump cycles; batteries are typically replaced every few years.
Battery backup or water-powered backup?
Water-powered backups need municipal water pressure and are allowed only in some places; battery systems work anywhere.
How do I test a backup pump?
Unplug the primary pump and pour water into the pit; the backup should start and its alarm should sound.