Filtration apparatus are disclosed. An example filtration apparatus includes a housing including a plurality of walls defining a cavity, a filter located in the cavity, and a cleanout system coupled to the housing. The cleanout system includes a cleanout passageway between an outer surface of the housing and the filter. The cleanout system includes a cleanout inlet accessible from the outer surface of the housing and a cleanout outlet in fluid communication with the filter. The cleanout system enables removal of particulate from the filter without removing the filter from the housing.