Sump Pumps Don't Last Forever. Fall Is the Right Time to Find Out Where Yours Stands.

Most people don't think about their sump pump until water is coming in. At that point, it's too late to be thoughtful about it — you're calling whoever answers the phone and hoping they can get there fast.

Fall is the window to avoid that scenario. The heavy rains of spring and early summer are behind us, the basement is dry, and you have time to actually evaluate your pump rather than react to a failure. If there's a problem, you fix it now, on your schedule. If there isn't, you head into winter with confidence.

Here's what that evaluation actually looks like.

How Long Should a Sump Pump Last?

The honest answer is 7–10 years for most residential sump pumps, with some lasting longer if they're quality units that haven't been overworked. A pump in a basement that floods twice a year is aging faster than one that rarely activates.

The problem is that most homeowners don't know when their pump was installed. If you bought your house without asking specifically about the sump pump age, you may have no idea whether it's 3 years old or 12. That uncertainty is itself a reason to have it inspected — especially if the home is more than a decade old.

The Simple Test You Should Do Right Now

Testing a sump pump takes about two minutes and requires nothing but a bucket of water.

Locate the pit in your basement or crawl space. Slowly pour water into the pit until the float rises enough to trigger the pump. It should activate promptly, pump the water out, and shut off cleanly. If it doesn't activate, activates slowly, runs but doesn't move water, or fails to shut off, you have a problem worth addressing before spring.

Also check the discharge line. Follow it from the pump to where it exits the house. Make sure the exterior outlet isn't blocked and that the line terminates well away from the foundation — if it empties too close to the house, the water cycles right back in.

Warning Signs That the Pump Is Struggling

Beyond the bucket test, there are behavioral signs that indicate a pump on its way out:

• Unusual noise: Rattling, grinding, or loud humming during operation suggests worn bearings or a damaged impeller. A healthy pump runs quietly.
• Frequent cycling: If the pump runs briefly, shuts off, and immediately runs again, the float switch may be stuck or the pump is undersized for your pit.
• Visible rust or corrosion: Surface rust on the exterior can be cosmetic, but rust on the motor housing or discharge connections is a sign of deeper deterioration.
• Water in the pit after dry weather: If there's standing water in the pit during a dry stretch, the check valve may have failed and water is siphoning back in after each pump cycle.
• Age without service history: If you've never had the pump serviced and you don't know when it was installed, that alone is worth a professional look.

The Battery Backup Question

This is the one homeowners in St. Charles County and St. Peters most often wish they'd addressed before a storm.

Your sump pump runs on electricity. Severe thunderstorms — the kind that also produce the heavy rain your pump needs to handle — frequently knock out power. A primary pump with no backup is useless during the exact event it's designed for.

Battery backup systems sit in the pit alongside your primary pump and activate automatically when the primary fails or when power goes out. They run on a deep-cycle battery that needs to be tested periodically and replaced every 3–5 years. A backup pump won't run indefinitely, but it buys you enough time to get through most outages without water coming in.

Combination units — a primary pump and battery backup in a single integrated system — simplify the setup and are worth considering if you're already replacing an aging pump.

The St. Peters and St. Charles areas both see significant spring storm activity, and the low-lying neighborhoods near the Missouri River drainage areas are especially vulnerable to extended pump demand. If your home has flooded before — or your neighbors' homes have — a battery backup is not optional.

When Repair Makes Sense vs. Replacement

A float switch replacement or check valve swap is inexpensive and absolutely worth doing if the pump motor itself is in good shape. But if the pump is over 8 years old and has a mechanical issue, the math usually favors replacement. Repairing an aging motor can cost half what a new pump costs, with no improvement in reliability and no extension of the remaining lifespan.

A new quality sump pump in the $300–$600 range, professionally installed, is straightforward. The cost of a wet basement — flooring, drywall, contents, mold remediation — is not.

Getting a Professional Assessment

If the bucket test raises questions, or if you simply don't know the history of your pump, a professional inspection gives you a clear picture. Our plumbing team can test the pump under load, check the check valve and discharge line, inspect the pit for debris, and give you a straight answer on whether to service or replace.

AAA technicians do not work on commission. You'll get an honest assessment — not one shaped by which outcome generates a bigger ticket. Call us at (636) 397-3200 and get ahead of this before the snow melts.

Frequently Asked Questions

How often should a sump pump be replaced?

Plan on 7–10 years as a general guideline, though usage and quality affect that significantly. A pump that runs frequently during heavy rain seasons will wear faster. If your pump is approaching or past 10 years, get it inspected rather than waiting for a failure.

Can I test my sump pump myself?

Yes. Pour a bucket of water slowly into the pit until the float rises and triggers the pump. It should activate, drain the pit, and shut off cleanly. If it doesn't respond correctly, or if it runs but doesn't move water, call a plumber. Also lift the float manually by hand — if the pump doesn't respond to that either, the switch may be stuck.

Is a battery backup sump pump worth it?

In St. Charles County, yes. Power outages frequently coincide with the heavy storms that create the most flooding risk. A battery backup activates automatically when the primary pump loses power and can run for several hours, which is enough to get through most outages without water intrusion.

What causes a sump pump to fail suddenly?

Common causes include a stuck or failed float switch, a clogged intake screen, a seized motor due to overheating, a failed check valve that lets water back into the pit, or a frozen or blocked discharge line. Regular testing catches most of these before they cause a flood.

How deep should water be in my sump pit?

In normal conditions, the pit should be mostly empty — just a small amount of residual water below the float. If there's standing water up near the float level during dry weather, the check valve may have failed and water is cycling back in after each pump run.

Does homeowner's insurance cover sump pump failure?

Standard homeowner's policies generally do not cover water damage caused by sump pump failure. Some policies offer a water backup rider as an add-on. Check your specific policy before assuming you're covered — and consider that prevention is far cheaper than the deductible on most water damage claims.