Why and How to Test Your Sump Pump Check Valve
No homeowner wants to deal with the hassle of a flooded basement. Keeping your drainage and sump pump systems in top condition is the best way to avoid trouble, and that includes attention to small but crucial pieces – like the check valve. It’s easy to overlook, but it has an essential job preventing water from flowing back into your home and basement.
This post breaks down the why, how, and when of maintenance for your sump pump’s check valve. Plus, we’ll wrap up with tips for keeping the whole system running smoothly with routine TLC.
Why Testing the Check Valve Matters
The main function of a check valve in the sump pump system is to prevent water that has been pumped out from re-entering the pit.
During heavy rain or flooding, the check valve jumps into action to prevent backflow and help the system keep up. Since the valve makes sure expelled water stays out, it helps to keep your basement dry and protected from damage.
As an integral player in the long game of protecting your foundation, regular testing helps make sure the check valve stays in prime condition to perform when you need it most.
Malfunction can lead to water flowing back into the basement, potentially flooding, and risking water damage. If the check valve isn’t functioning properly, your sump pump may also overwork, which causes unnecessary wear on the whole system.
How to Test a Check Valve

Potential Problems and Suggested Solutions
Over time, check valves can run just into issues, even with proper care. These are some examples and straightforward ideas for solutions.
Eventually, your sump pump check valve might:
- Stick – Debris or sediment can cause the valve to stick, either staying open or closed. If you notice the water isn’t draining properly or is coming back into the sump pit, try cleaning the valve.
- Clog – Over time, dirt and sediment can clog the check valve, making it harder for water to flow through. Just disassemble the valve, clean out any accumulated debris, and then regularly assess it to prevent recurrences.
- Wear Out – Check valves can get old and lose function, especially with frequent use. If your valve looks worn or doesn’t seal tightly, it’s time for a replacement. Finally, a check valve might have been installed improperly, causing it not to function as it should. Make sure the arrow on the valve points away from the sump pump – it should indicate the flow direction accurately, so double-check!
Other Sump Pump Upkeep
- Clean the pit regularly to prevent clogs and ensure the pump can work efficiently.
- Inspect the discharge pipe and make sure it’s clear of obstructions so it can direct water away from your foundation. Look for any leaks or damage, and make sure the pipe is securely connected.
- Test the pump itself at least once a year by pouring water into the pit to check that the pump activates and pumps water out. Watch and listen for anything strange.
- Check the backup system, if you have one, and replace the battery as needed.
When to Bring in Professionals
Sometimes, even the most diligent homeowner needs a little backup. If your sump pump system is making unusual noises, cycling on and off frequently, or showing signs of leaks, it’s a good idea to call an expert.
If you’re hesitant about handling the check valve inspection or replacement yourself, don’t sweat it. A professional can ensure everything is installed correctly and functioning as it should. Systems with additional features, like battery backups or smart controls, benefit greatly from expert maintenance.
Wrapping Up
Taking care of your sump pump and check valve is a safe, smart practice – plus, it’s pretty simple to do. Attention to regular maintenance tasks like this can save you from future stress and costly repairs.
But if you ever find yourself unsure or facing a more complex problem, don’t hesitate to call in the experts. In Naperville, IL, and surrounding areas, schedule in-depth assessments and get expert advice at Prospective Home Inspections.