A battery backup sump pump should be selected around two needs: moving incoming water at the actual discharge head and providing a suitable period of operation during an outage. A large headline flow rating cannot answer both questions.
Before fall storms, review the existing installation and decide which failure you want the backup to address. Loss of electricity and failure of the primary pump are different events. The chosen arrangement should be evaluated for each.
Identify what the backup includes
A dedicated battery-operated pump is different from an inverter or battery supply that powers the existing AC pump. Keeping the same pump running can address a power interruption, but it leaves the original pump and its controls as shared components.
A second pump provides another pumping path within the limits of the installation. It may still share discharge piping or other components. Ask the installer which failures the proposed system can handle and which remain outside its protection.
Compare flow at installed head
Measure the vertical lift and describe the discharge piping, bends and connections. Compare the backup pump's curve at the resulting total dynamic head. It must deliver appropriate flow under those conditions, not only at minimal resistance.
If the primary system barely keeps up during rain, do not assume a smaller backup will do the same job. Have the installer assess inflow and operating requirements. Use ePumps' sump pump sizing guide as background for that discussion.
Treat runtime claims as conditional
Runtime depends on the approved battery, its condition and how much of the time the pump must operate. Occasional cycles and continuous operation are different loads. Ask which battery and test conditions support a manufacturer's published runtime.
A simple example helps frame the question: a pump operating 15 minutes in each hour is working at a 25 percent duty cycle. That describes the running pattern, not a promised battery duration. Real storm conditions and battery performance still have to be considered.
Review the Sta-Rite package carefully
ePumps lists the Sta-Rite DB20018T backup sump pump with charging equipment, audio and visual alerts, a check valve and battery case. Confirm whether the battery itself is included and which approved battery is required.
The listing contains differing electrical and performance details in its title and description. Ask ePumps to confirm the current manufacturer documentation for the unit being supplied rather than using those conflicting details to size an installation.
Make room for both pumps and controls
The secondary pump and its control need space without obstructing primary operation. Check basin width, depth, pipe layout and the movement required by each float. Installation height should support the intended sequence of operation.
A second pump cannot overcome a blocked common discharge. Have the installer assess check valves and routing as part of the backup design. Where freezing is a risk, address the discharge arrangement before relying on additional battery capacity.
Plan testing and maintenance
Follow the backup system manual for testing, battery service and alert checks. A charger light alone does not prove that the pump will remove water during an outage. Ask for a demonstration of the approved operating test after installation.
Keep the instructions and component details accessible. Note the battery model and any service intervals. If the system reports a fault, investigate it while the basement is dry instead of silencing the alarm and waiting for rain.
Confirm the full order before checkout
Compare the cost and availability of the whole installation: pump, controls, approved battery, fittings and professional work where required. Do not plan emergency protection around an unconfirmed delivery date.
Review the DB20018T listing, then call ePumps at (844) 378-6771 with the primary pump details and discharge route. Confirm specifications, package contents and current lead time before ordering.
Frequently asked questions
How long will a battery backup sump pump run?
There is no universal duration. Use the manufacturer's data for the approved battery, operating head and duty conditions, then account for battery condition.
Does a battery case mean a battery is included?
No. Verify the package contents and required battery separately before ordering.
Can a backup pump handle a blocked discharge?
Not if its discharge route is also blocked. The installation must address shared piping and other common failure points.
