This is not an ad. My sump pump pit is really tight making it difficult to squeeze in a backup so I found this set up.
It allows you to use your existing sump pump if you lose power but connect up to 3 batteries for longer pump time and no need to plumb for another pump. When not needed, it keeps the batteries charged.
http://www.secamerica.com/products/battery-backups/sump-pump-battery-backup-model-822-ps/
It allows you to use your existing sump pump if you lose power but connect up to 3 batteries for longer pump time and no need to plumb for another pump. When not needed, it keeps the batteries charged.
http://www.secamerica.com/products/battery-backups/sump-pump-battery-backup-model-822-ps/