The Outback’s pre-filter net (PFnet2) is a 100 micron fine filament poly mesh, designed for surface filtration where a defined pore size opening is critical. The polyester multifilament filtration net provides great dirt, sediment and large debris removal capacity. The net is secured over the top upper lip of the 2 gallon bucket and is used on both the OB-22 and the OB-25 models. The net is an important part of the overall Outback design helping to prolong the life span of both the primary and the secondary filters. The net can cleaned by removing it from the lid of the bucket rinsing it with clear clean water and reinstalling it on the upper two gallon bucket.