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Do You Need a Battery Backup Sump Pump?

The storms that flood a Chicago basement are usually the same storms that take out the power. That is the entire case for a backup: a primary sump pump with no electricity cannot protect anything, and heavy rain does not wait for the power to come back on. King installs sump pumps including battery-powered models, and if you want a battery backup sump pump assessed for your basement, our plumbers will look at your pit and your water volume before recommending anything.

A Battery-Powered Backup Pump

This is the answer to a power outage. The unit runs off a battery instead of household current, so when the lights go out the pit keeps getting pumped. King carries sump pump models that are battery powered specifically so that a basement stays protected through a major storm that cuts power to the home.

Best for: homes that lose power during summer storms — which across Chicagoland is most homes.
Runs independently: no household current required while the battery holds charge.
Installed by our plumbers: every sump pump we install is backed by our 100% satisfaction guarantee.
The limitation: run time depends on the battery, the pump, and how hard the pit is working.

If you're having issues, call us for sump pump repair in Chicago right away so that we can get a plumber out to your home.

A Second Pump on a Separate Circuit

This is the answer to a pump failure rather than a power failure. Installing a second sump pump as a backup — especially one on its own circuit — means a mechanical failure or a tripped breaker on the primary does not leave the pit unattended. Many experts agree this redundancy is worth it, and it has spared plenty of local homeowners a flooded basement.

Best for: an aging primary pump, or any basement where a single point of failure is unacceptable.
Covers mechanical failure: a seized motor or stuck float on the primary no longer means standing water.
The separate circuit matters: a tripped breaker takes out everything on that circuit, backup included.
The limitation: it still needs household power, so on its own it does not cover an outage.

Which Setup Do You Need?

What it protects against: battery backup covers a power outage · a second pump covers a mechanical failure.
Runs without household power: battery backup yes · second pump no.
Usual reason people buy: repeated storm outages · an aging or overworked primary pump.
Best-case setup: both, if the basement is finished and the pit works hard.
What does not change either way: an annual inspection, or neither one helps you.

Finished basements

Flooring, drywall, and belongings turn a pump failure into a very expensive problem.

A high water table

Or a pit that cycles frequently even in ordinary weather.

A working sump pump protects your home and basement from flooding and water damage, especially during high rain or snowmelt.

Regular storm outages

If your block loses power most summers, you already know the answer.

An older primary pump

Common across the south and southwest suburbs, where pump age is often unknown.

Anyone who travels

A failure you are not home to notice runs for days rather than hours.

Summer thunderstorms and spring snowmelt produce the highest groundwater volumes of the year — and summer storms are also the leading cause of residential power outages across Chicagoland. The failure mode is not exotic. It is the most predictable thing in residential plumbing: maximum water, zero power, same afternoon. If you are not sure what a sump pump does or whether your home needs one, start with our overview of what sump pumps are and why Chicago homes need them.

After getting a call from a local homeowner, a King plumber inspects a buried sewer line for signs of damage and clogs.

When the Problem Is Not the Pump

A backup protects against water coming up through the pit. It does nothing about water coming up through the floor drains, which is a different problem with a different fix. If heavy rain brings standing water or sewage in through basement drains rather than the sump, the issue is likely further down the line — read our guide to sewer line problems, and ask about backflow prevention alongside drain cleaning.

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Keeping a Backup Ready

A backup system is only useful if it runs on the day it matters, and the failure mode for backups is neglect rather than wear — they sit unused for months and then are asked to perform under load.

Have the whole system inspected annually, before the spring rains. We check parts and clear the dirt and gravel that accumulates in the pit.
Test the float switch on both pumps — a stuck float is a working pump that never turns on.
Keep the discharge line clear and directed away from the foundation.
Watch battery age. Batteries degrade whether or not they are ever used.
Know the warning signs: constant running, rapid cycling, grinding, or a pit that stays full.

For the replacement side of the decision — when repair stops making sense and what drives the cost — see our sump pump cost and replacement guide for Chicago.

Battery Backup Sump Pump FAQs

Do I need a battery backup sump pump?

What does a battery backup sump pump actually do?

Is a backup pump the same as a second sump pump?

How long will a battery backup run during an outage?

How do I know if my sump pump is about to fail?

How often should a sump pump be inspected?

Do you install sump pumps you did not originally sell?

$25 Off Any Sump Pump Replacement

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If you are in need of a new sump pump for your basement you are in luck! Hire us and get $25 off a new sump pump.

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Protect Your Basement Before the Next Storm

Call (708) 687-6898 or request service online for 24/7 sump pump repair, service, and installation. Ask about our free VIP plumbing inspection, check current offers on our coupons page, and see our service areas if you are not sure we reach you. See what neighbors say on our reviews page, or learn more about King, family-owned since 1968. We are a full-service Chicago plumbing team — whatever else the basement needs, we handle it.