Pond Boss Forums GENERAL QUESTIONS Pond Boss What's wrong with this picture?

RDF = Rotating Drum Filter. From what I understand, water goes into the drum from the center end and flows out the "bottom" and "sides" of the drum as it rotates. When the drum screen or filter starts to get plugged, the nozzles turn on, washing the screen clear. What I haven't figured out yet (I haven't looked either) is how the solids that are clogging the screen that the nozzles wash off get out of the inside of the drum, and how the nozzles determine when to turn on. They might be on a timer, or there might be a level sensor for the water level inside the drum.