USA Expert Plumbing

Sump pump maintenance: a yearly checklist

By USA Expert Plumbing Editorial Team. Updated . 1 min read.

Short answer

Once a year, and before rainy seasons, test the sump pump by filling the pit with water, clean debris from the pit and pump intake, check that the float moves freely, confirm the check valve holds, clear the discharge line outside, and test any battery backup. Replace pumps that struggle or are more than about seven to ten years old.

In this guide
  1. The yearly checklist
  2. Warning signs
  3. Seasonal notes
  4. Replacement vs repair

A sump pump sits idle for months, then has to work perfectly during the worst storm of the year. A yearly check is how you know it will.

The yearly checklist

  1. Test the pump. Pour water into the pit until the float rises. The pump should start, empty the pit and shut off.
  2. Clean the pit. Unplug the pump first, then remove gravel, silt and debris.
  3. Clean the intake screen on submersible pumps.
  4. Check the float. Make sure the cord or float cannot snag on the pit wall or wiring.
  5. Check the check valve. After the pump shuts off, water should not flow back into the pit.
  6. Inspect the discharge line outside for blockages, damage and proper drainage away from the house.
  7. Test the backup. Check battery condition and run a test cycle.
  8. Check the power. The pump should be on its own properly protected outlet.

Unplug the pump before reaching into the pit.

Warning signs

  • Runs constantly or cycles every few seconds
  • Hums but does not pump
  • Loud grinding or rattling
  • Visible rust or corrosion

Seasonal notes

Before winter, protect the discharge line from freezing; see our sump pump winter maintenance guide. For repair and replacement prices, see our sump pump repair cost and sump pump installation cost guides.

Replacement vs repair

If the pump fails its test, a simple fix like freeing the float or replacing the check valve may be enough. A pump that hums without moving water, overheats or is more than about seven to ten years old is usually better replaced. See our sump pump repair cost guide for common repairs.

Common questions

How often should a sump pump be tested?

At least once a year, and before rainy seasons. Many homeowners test every few months.

How long do sump pumps last?

Most last about 7 to 10 years.

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