A human hair is approximately 50 micron

It removes dirt

DAB-300MP - PUMP SURFACE MOUNTED CAST IRON WITH PRESSURE SWITCH 175L/MIN 51M 2

Features - True matched precipitation any arc or radius setting- Radius can be reduced up to 25% on all models- Double-pop feature keeps dirt and debris out of nozzle- Removable filter screen prevents large objects from clogging nozzle- Low precipitation rate- Wind-resistant multi-stream technology- Adjustable arc and radiusSpecifications - - Yellow rotator nozzle- 6

thus optimizing alternating use of the two unitsMore power

SRB Storm PVC Grate In Pipe 90mm White Disk Filter A human hair is approximatelySSWF0610 Grate SRB Storm PVC Grate In Pipe 90mm White