Backup Sump Pump Options for Missouri Homes

If your primary sump pump fails during a storm or power outage, your basement can flood within minutes. That’s why installing a backup sump pump is one of the smartest upgrades Missouri homeowners can make to prevent costly water damage.

At Purisync Heating and Air, we help homeowners in Kirkwood, Affton, and beyond choose the right backup sump pump system for their needs. Here’s what to know about your options.

Why You Need a Sump Pump Backup

Missouri storms often cause power outages and heavy rainfall — a dangerous combination. If your main sump pump stops working, water quickly builds up in your basement. A backup system ensures continued protection when you need it most.

Battery Backup Sump Pumps

How they work: A battery-powered pump activates when your main pump fails or loses power. It runs on a deep-cycle battery that can operate for hours or even days, depending on capacity.

Pros:

• Works during power outages
• Rechargeable and automatic operation
• Can handle significant water volume

Cons:

• Batteries require replacement every 3–5 years
• Limited run time depending on charge
• Higher upfront cost ($500–$1,200 installed)

Water-Powered Backup Sump Pumps

How they work: Uses municipal water pressure to remove water from your sump pit when the main pump fails. No electricity or battery needed.

Pros:

• No battery to maintain
• Unlimited run time if water pressure stays consistent
• Ideal for long-term outages

Cons:

• Only works if connected to city water (not well systems)
• Less powerful than battery backups
• May raise your water bill during use

Combination Sump Pump Systems

Many homes benefit from a combination sump system that includes:

• Main AC-powered sump pump
• Battery-powered backup pump
• Integrated alarm system and monitoring

These all-in-one systems offer reliable flood protection — even if one component fails.

Which Backup System Is Right for You?

The best option depends on:

• Your local water source (city vs. well)
• Frequency of outages in your area
• Your basement’s flood history
• Budget and maintenance preference

We can help you decide and install the right solution — fast.

Schedule a Backup System Consultation

Purisync provides sump pump installation and maintenance throughout:

• Crestwood
• Webster Groves
• Sappington
• Town and Country

Call (314) 338-5111 or book online to prevent basement flooding before it starts. And don’t forget to read our guide on flooded basement prevention for more protection tips.