A granular material handling apparatus has a metering assembly comprises a metering module removably mounted in an opening in a hopper. The metering module comprises a meter roller and a front metering member with a metering edge parallel to and at a fixed metering gap distance from the meter roller. A removable flow structure receives granular material flowing over the metering edge and directs same into a distribution assembly mounted under the material metering assembly and comprising venturi devices spaced along the hopper under the metering module and an air supply conduit. Each venturi device is connected to the air supply conduit and is adapted at an output end thereof for connection to a distribution conduit, and defines a product input opening. The flow structure is operative to direct the received granular material substantially equally into each of the product input openings.
