- Qualifies if
- A backup sump pump or primary-plus-backup system.
- Ranked by
- Max flow (maker) (highest first)
- Shown
- The top 8 of 10 products in our catalog that meet the rule.
#1 · Max flow (maker): 85 GPM
Wayne WSS30VN Primary and Battery Backup Combo
Primary and backup preassembled on one discharge.
#2 · Max flow (maker): 73.3 GPM
Basement Watchdog CITS-50 Combo System
Cast iron primary and a monitoring controller.
#3 · Max flow (maker): 45 GPM
Wayne ESP25n Battery Backup Sump Pump
Steel and cast iron with top suction.
#4 · Max flow (maker): 42 GPM
Basement Watchdog BWE Emergency Battery Backup
Monitoring and a dual float.
#5 · Max flow (maker): 1380 GPH
Superior Pump 91012 12 Volt Utility Pump
Runs from any 12 V battery.
#6 · Max flow (maker): 19.8 GPM
Liberty Pumps SumpJet SJ10 Water-Powered Backup
No battery to maintain.
#8 · Max flow (maker): Not stated by the maker
Basement Watchdog Special CONNECT Battery Backup
Monitoring controller and dual float.
How to choose between them
A backup runs when the primary pump fails or the power is out, usually during the storms that fill the pit fastest. Battery backups need a deep-cycle battery; water-powered backups need city water pressure.
Runtime depends on battery size and how often the pump cycles; estimate it with the runtime calculator.
Rankings follow the rule and order stated above, using makers' published specifications and listed prices. How we research · Disclosure