the.com/sump pump

The unpaid intern standing between your basement and a lawsuit from Poseidon.

means A submersible pump installed in a basement pit that automatically switches on to drain accumulating groundwater before it floods the space.

from A compound of two straightforward working words. 'Sump' traces back to a Germanic root (related to Middle Low German 'sump', meaning a swamp or morass) and came to mean a low pit or reservoir where liquid collects. 'Pump' is older still, likely imitative or linked to Low German and Dutch words for mechanical lifting devices, first describing hand-operated water-raising tools. Jam them together and you get exactly what it says: a pump for the sump — no poetry required, just 19th/20th-century industrial plainspokenness naming a hole and the machine that empties it.

silent failure
Dies quietly during storms, floods loudly after
backup rule
Battery backup exists because power fails with weather
check valve
Prevents pumped water from sliding back down
test it
Pour a bucket in monthly, hear it work
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