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King County Plumbing

Keep the water outside the foundation

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Sump pump in a basin under floor joists in a crawl space

Western Washington's rain season runs October through spring, and a lot of King County housing, basement homes on the slopes, crawl-space ramblers on the valley floor, sits where groundwater wants to be. A sump pump collects it at the low point and sends it out before it finds your floor.

When do you actually need one?

  • Water standing in the crawl space after heavy rain
  • A basement that smells damp or shows tide lines on the walls
  • A sump pit that's there but empty, older homes have the pit, nobody installed the pump
  • An existing pump that cycles constantly, won't start, or quit mid-storm

What does the job involve?

  • New install: pit excavation, basin, pump, check valve, discharge line routed out, the biggest version of the job
  • Swap: pump out, new pump in, the cheap version when the basin and line already exist
  • Backup: battery or water-powered backup for the storms that knock the power out, which in this county is exactly when the pump is needed most

What should a quote include?

Basin or reuse of the existing one, pump capacity matched to how much water the pit actually takes on, where the discharge daylights, and whether the electrical feed is a dedicated circuit. A pro who covers your town has seen what your neighborhood's soil does in February.

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