Published: November 27, 2017 | Last updated: July 5, 2023

What Does Sump Mean?

A sump collects water that is building up underground so that it can be pumped away from a construction site or finished building. The source of water for a sump is normally groundwater, but waste water generated from appliances can also be routed to a sump.

Sumps are emptied by pumping their contents to a sewer network using a sump pump. Sumps are used in both trenchless and conventional construction projects and applications and can be used during the dewatering of a construction site.


Trenchlesspedia Explains Sump

A sump is built based on the risk of water affecting a construction project or finished building. Water that builds up against a basement wall causes damp and mold to damage the wall and give off odors. Sumps are, therefore, a protection mechanism to keep water away from buildings.

Automatic systems measure the level in the sump and activate a sump pump when the sump is full. The water is pumped into a sewer network. Clean water can be pumped to a storm water network, but contaminated water must be pumped to a waste water network.


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