Abstract: An assembly is provided to distribute flowable particulate material, and includes a conduit to which the material is delivered and to which an airstream is supplied to move the material along the conduit to a delivery downstream destination, a separator, within the conduit, to engage the airstream to concentrate the material in a concentrated portion of the airstream by separating a portion of the airstream, an output connected to the conduit downstream of the separator to receive the flowable particular material and deliver the material to the downstream destination, and an air distribution head in constant fluid communication with the separator to receive the separated portion of the air stream and also in constant fluid communication with the output to assist the delivery of the flowable particulate material by the output to the downstream destination by delivering the separated portion of the air stream to the output.