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Wet Wells/Lift Stations

Wet wells are the holding sump for gravity-flow sewer systems. As sewage enters the wet well and the water level rises, pumps are engaged to pump out the sewage to a forced main, or the sewage is lifted to a higher grade to continue the gravity flow to the outlet point. Solid material will accumulate in the bottom of the wet well and incoming sewage lines.

Lift stations are low points in a gravity-flow sewer system where incoming sewage is pumped from a well to a higher grade to continue the gravity flow to the treatment plant. As solid material, such as rags, enter the lift station, buildup will occur on the bottom of the well and in other components within the station. Solid materials can often plug or damage pump impellers, so periodic cleaning is required to remove the solid material from the lift station.