A wastewater (septic) treatment plant is a facility that converts wastewater into an effluent that can be returned to the water cycle.

Built-up sludge in pits and wells at the treatment plant can negatively affect the wastewater treatment process. In the initial, or primary, treatment the wastewater is put in large tanks or ponds to let the solid material, called sludge, either float to the surface or settle to the bottom. The water is then typically chlorinated, and the sludge is treated and hauled off.

Hydro Clear Services uses combination machines to clean these systems by flushing the material into a vacuum tube for disposal in an environmentally responsible manner and in according to local regulations.