A pump that cycles nonstop, hums, or sits silent before a storm.
What a sump pump does, the types, how long they last, the signs of failure and what replacement costs.

What a sump pump is, how to tell yours is failing, repair vs replace, and what it costs.
Pump plus labor, new pit vs existing, and what a fair quote includes. Dated numbers.
Submersible vs pedestal, horsepower in plain words, and which suits which basement; price.
Why a backup matters in a storm outage, battery vs water-powered, and the price.
Labelled diagram: pit, float switch, check valve, discharge. Recognition, so the reader can tell what failed.
What the check valve does, the 'thunk' and short-cycling signs, and the part price.
Where the water should go, freezing problems, and what a fix costs. Rules on where it may drain are local; we never claim code compliance.
Why an airtight lid matters (radon, moisture, kids and pets), what one costs.
When a crawl space needs a pump, how it differs from a basement pump, and the price.