Is Your Sump Pump Ready for Storm Season? How to Test It in 5 Minutes
Late summer storms can dump a lot of rain on the Twin Cities in a short amount of time, and your sump pump is the one piece of equipment standing between that rain and a wet basement. Most homeowners never think about their sump pump until the moment they need it most. A quick sump pump test now takes about five minutes and can save you from finding out the hard way that it was not working.
Why Testing Your Sump Pump Matters Before Storm Season
A sump pump can sit completely unused for weeks or even months between rain events, which means a failing part rarely announces itself ahead of time. A stuck float switch, a worn out motor, or a clogged discharge line can all go unnoticed until the pit fills with water and the pump does not turn on. Even a small amount of standing water can cause lasting damage, and the Federal Emergency Management Agency notes that flooding is one of the most common and costly disasters a home can face.
Testing it before storm season gives you a chance to catch these problems while you still have time to schedule a repair, and it pairs well with other seasonal checks, like making sure you know how to prevent frozen pipes once the weather turns colder later in the year.
How to Test Your Sump Pump in 5 Minutes
Grab a bucket of water and set aside five minutes to run through this quick check.
- Clear the pit of debris: Remove the cover and check for mud, gravel, or anything else that could block the pump intake or float switch.
- Pour in a bucket of water: Slowly pour water into the pit until the water level rises toward the float switch.
- Watch the float switch: It should rise with the water and trigger the pump automatically, without you needing to touch it.
- Listen for the pump activating: You should hear the motor kick on within a few seconds of the float rising.
- Check the discharge line: Confirm water is actually flowing out through the discharge pipe and away from your foundation, not just circulating in the pit.
If the pump activates quickly and pushes water out through the discharge line without any strange noises, it passed the test. If something felt off along the way, it is worth a closer look before the next storm rolls through.
Signs Your Sump Pump May Be Failing
Beyond the five minute test, a few patterns tend to show up when a sump pump is on its way out.
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- The pump runs constantly without a storm: A pump that cycles on and off with no rain in sight often points to a stuck float switch or a pump that is undersized for how much water is reaching the pit.
- The float switch is stuck or sticking: If the float does not rise and fall smoothly, or it snags on the side of the pit, the pump may never get the signal it needs to turn on during a real storm.
- You hear grinding, rattling, or odd noises: Unusual sounds usually mean something inside the pump, like the impeller or motor bearings, is wearing out and will not last much longer.
- The motor hums but nothing happens: A pump that hums without actually moving water often has a jammed impeller or a motor that has burned out internally.
- The backup battery isn’t holding a charge: If your home has a backup sump pump system, a battery that will not hold a charge leaves you without protection the moment the power goes out during a storm.
Any one of these on its own is worth a closer look, and a couple showing up together usually means the pump is closer to failing than it lets on. The sooner you catch it, the more options you have before the next storm puts it to the test.
Frequently Asked Questions
How often should a sump pump run during rain?
During steady or heavy rain, it is normal for a sump pump to cycle every few minutes as groundwater collects in the pit. If it is running far more often than that, or seems to run nonstop even during a light rain, it may be struggling to keep up or dealing with a stuck float switch. A technician can tell you whether the cycling pattern you are seeing is normal for your home.
How do I test my sump pump to make sure it’s working?
The fastest way is to pour a bucket of water into the pit and watch whether the float switch rises, the pump activates, and water flows out through the discharge line. This simple test takes about five minutes and catches most common problems before they become a bigger issue. If anything looks or sounds off during the test, it is worth having a professional take a closer look.
What should I do if the sump pump fails during a storm?
If your sump pump stops working during an active storm, move valuables away from the floor and, if it is safe to do so, check whether the pump is plugged in and the breaker has not tripped. Avoid standing in water near an electrical outlet or the pump itself. Once the storm passes, schedule a repair right away so your home is protected before the next round of rain.
What to Do If Your Test Turns Up a Problem
If your pump did not activate, the discharge line was not moving water, or you noticed any of the warning signs above, it is best to get it checked out before the next heavy rain rather than after. A quick repair now can help you avoid a flooded basement without the stress of dealing with water damage during a storm.
Thelen Plumbing, Heating & Air offers sump pump repair throughout the Twin Cities, including diagnosis of float switch problems, worn motors, and backup battery systems. If your test raised any concerns, or you would simply like a professional to confirm your pump is ready for the season, contact us to schedule a visit before the next storm arrives.





