Gully emptier
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A gully emptier is a type of specialized tanker-lorry with suction gear which can suck wastewater and mud and sludge out of hollows such as the hollows below drain grids in street gutters and carry it to a suitable disposal point. It needs to be able to suck out and pump through into its tank any road grit and miscellaneous solids that have got into the hollow.
It has a means of squeezing the water of its load and letting that water run down the drain.