Market guide
Choose a primary, backup or combination sump system
Compare what the purchase actually includesPrimary pumps, add-on backups and preassembled combinations solve different parts of the failure chain. Compare the complete installed system, not the number printed on one carton.
01
Primary
Define the normal-duty pump
Match its curve, switch, basin and service path to routine inflow and head.
- Alarm
- A primary without a high-water alarm can fail silently.
- Power
- A stronger AC pump still stops when its supply or circuit fails.
02
Backup
List the failures it can cover
Keep pump failure, power loss, stuck float, high water, blocked check valve and frozen discharge separate.
- Battery
- Price the exact supported battery, charger, cables and replacement cycle.
- Discharge
- A shared pipe can remain one common failure even with two pumps.
03
Combination
Audit every included component
Confirm both pumps, independent switches, check valves, controller, alarm, battery box, network hardware and final installation materials.
- Basin
- Preassembled does not mean that the assembly fits the existing pit.
- Cost
- Compare the installed total with service access and replacement parts included.
Evidence used
First-party sources behind this guide
- 01Residential sump pumps and Aquanot backup systemsZoeller · checked August 18, 2026Open source
- 02Current sump pumps and combination systemsWayne · checked August 18, 2026Open source
- 03Flood cleanup safetyCDC · checked August 18, 2026Open source