The backwash sequence is triggered for an individual filter unit by either a preset pressure differential or a time interval. Upon activation, the control unit opens the discharge valve of the designated unit. Exposing this valve to atmospheric pressure creates a significant pressure drop, inducing a powerful reverse flow. This reverse flow drives a hydraulic turbine, which rotates the cleaning collector while a piston moves it linearly. The collector's nozzles generate high-velocity suction, vacuuming accumulated debris from the inner screen and expelling it through the drainage pipe. This combined helical motion ensures a systematic and thorough cleaning of the entire screen surface. During the backwash process, both sides of the double-body filter continue filtering simultaneously — only a temporary pressure drop is observed. The cleaning sequence is then performed sequentially for each side of the double-body unit. Once complete, the discharge valve closes and the collector returns to its home position, concluding the cycle for that unit. Throughout this self-cleaning process, system filtration continues uninterrupted.

Water enters the filter and passes sequentially through a coarse and then a fine screen. As contaminants accumulate on the inner surface of the fine screen, a pressure differential is created between the inlet and outlet. A backwash cycle is automatically initiated based on one of two conditions: when this pressure differential reaches a predetermined setpoint, or after a preset time interval has elapsed, whichever occurs first.