Sump

A sump is a low space that collects often undesirable liquids such as water or chemicals. A sump can also be an infiltration basin used to manage surface runoff water and recharge underground aquifers. Sump can also refer to an area in a cave where an underground flow of water exits the cave into the earth.

This article is about sumps in general. For cave sumps, see Sump (cave).
"Oil pan" redirects here. For the Transformer, see Oil Pan (Transformers).
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