cleaning of the duct and filter will be an annual drawing dwg file. for the cleaning of the filter, a replacement pump must be used, placing the suction hose in the existing distribution/drainage tube in the center of the filter (see cut). if Constantine that the above operation is insufficient to remove sludge, water should be through the surface of the filtering bed, draining it again. water can be through the filtering bed through the water insert tube. in this operation, care should be careful not to promote complete "washing" of the filter, as such procedure would delay the start of operation of this after cleaning.