Cost GuideUpdated July 16, 2026
Markham's flat terrain and clay-heavy soil mean basement water problems are common, especially during spring and summer storms. If your home's sump pump fails, you risk a flooded basement and expensive repairs. With many houses here built 50 to 70 years ago, we find aging sump pump systems that may not stand up to another wet season. Testing your sump pump before the downpours is a straightforward job that can save you a headache and a big bill.
Why Older Markham Homes Need Sump Pump Attention
Most houses in the area rely on sump pumps because the moderate water table and poor drainage make basements vulnerable. Heavy thunderstorm activity in the summer brings a lot of water in a short time. Combine that with the clay-rich soils local to Markham, and sump pits fill up fast. If your pump or check valve fails, water starts rising. Many of the sump systems we find in Markham haven't been upgraded in decades. Age brings risk for stuck floats, corroded lines, and worn-out impellers. Even newer developments aren't immune, especially if maintenance has been skipped.
The Steps to Test Your Sump Pump
Before the next big storm, it's smart to run a quick and thorough check. Here's a proven step-by-step process:
- Unplug both the sump pump and the float switch from the outlet. Plug only the pump in. Listen for the motor running (it should hum quietly, not grind).
- Take a five-gallon bucket of water and pour it slowly into the sump pit. Watch the float rise. Reconnect the float to the pump if needed, and check if the pump activates and removes the water quickly.
- Inspect the discharge pipe outside. Make sure water is moving away from the foundation and not pooling back toward the house.
- Look for rust, corrosion, and debris around the pump and pit. Blockages can burn out motors fast. Clear any mud or gravel you see.
- Test the check valve on the discharge line. After the pump shuts off, water should not return to the pit. Listen for backflow or gurgling.
If your system doesn't start or pump water as expected, or you hear odd noises, that's a sign it's time for repairs or possible replacement. For older pumps, we often find it makes more sense to install a new, reliable model rather than risk a flood.
Common Sump Pump Problems and Warning Signs
Sump pumps are mechanical. Things wear out, especially after years of sitting unused except during heavy storms. We frequently see older Markham pumps with the following issues:
- Float switches stuck or slow to react
- Motors that run but don't discharge water (blocked or broken impeller)
- Discharge pipes clogged or frozen (less common in summer, but still possible)
- Electrical failures, including tripped GFCI outlets
- Check valves failing, letting water flow back into the pit
If you notice any of these, or if your pit smells musty or moldy, your system could be due for maintenance. You can always talk with us about sump pump services if you're unsure what you're seeing.
How Much Does Sump Pump Testing and Service Cost?
Testing the sump pump yourself costs nothing but a bit of time. For many Markham homeowners, that's enough for peace of mind before storms hit. If you run into trouble, professional sump pump inspections or service repairs can vary in price depending on what we find, age, brand, and whether parts are needed. Sometimes, the problem is minor, like a blocked check valve or float. Other times, a full replacement is the safest fix, especially for pumps over 10 years old. If you're dealing with repeated basement moisture, we may also look at other plumbing issues, such as drain cleaning or sewer line repairs, since clogs can compound water problems.
What Else Should You Check Before Storm Season?
Besides the pump, check your home's plumbing for other common weak points. Older Markham homes can have clay-tile sewer lines, corroded galvanized or cast iron pipes, and aging water heaters, any of which can worsen basement problems if they fail. Regular inspection helps prevent leaks and water damage. If your basement has a history of seepage or foundation leaks, our leak detection & repair crew can pinpoint trouble spots. For houses with frequent basement moisture, sometimes a backup pump or battery system is worth looking into. It's also smart to have old pipes checked or replaced before stormwater reveals bigger weaknesses.
Dealing with Markham's mix of old homes, clay soil, and unpredictable summer storms, it makes sense to test your sump pump long before rain hits. If you run into trouble or just want a pro to check things over, give us a call at 708-729-6560. We keep Markham basements dry and protected, season after season.