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File:2023-07-30 20 08 18 A newly-installed sump pump in the basement of a house along Aquetong Lane in the Mountainview section of Ewing Township, Mercer County, New Jersey.jpg - Wikimedia Commons

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What is a Sump Pump Float Switch & How It Works

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File:Steam Powered Sump Pump 1 (cropped).jpg - Wikimedia Commons