The short answer
7–10 yearstypical sump pump lifespan
Submersible pumps — the common kind — set the band; pedestal pumps can run longer because the motor stays out of the water. But duty cycle dominates age: a high water table that kicks the pump on every few minutes can wear it out in half the typical range, while a pump that only runs in spring can coast past it. The catch is how they fail — not gradually, but by not starting during the first big storm after a quiet stretch. That’s why the bucket test below matters more than any spec sheet.What shortens or extends its life
Shortens it
• A high water table keeping the duty cycle relentless• Silt and debris jamming the impeller or the float switch• Short cycling from a failed check valve or an undersized pit• Power surges, and dry-running when a stuck float leaves it onExtends it
• Quarterly testing — pour in a bucket of water, watch it start, pump down, and stop• A clean pit: no gravel, silt, or things that fell in• A working check valve, so pumped water can’t fall back and re-trigger the cycle• Sizing matched to your actual inflow rather than “bigger is better”Warning signs it’s failing
• It doesn’t start when the float rises — the only test that really counts• Grinding or rattling: impeller damage or failing bearings• Running constantly, or clicking on and off in rapid cycles• Visible rust and corrosion on the housing or fittings• An original pump past 7 years old — replacing proactively is cheap insurance