A granular material handling apparatus has a metering assembly comprises ameteringmodule removably mounted in an opening in a hopper. The metering modulecomprisesa meter roller and a front metering member with a metering edge parallel toand at a fixedmetering gap distance from the meter roller. A removable flow structurereceivesgranular material flowing over the metering edge and directs same into adistributionassembly mounted under the material metering assembly and comprising venturidevicesspaced along the hopper under the metering module and an air supply conduit.Eachventuri device is connected to the air supply conduit and is adapted at anoutput endthereof for connection to a distribution conduit, and defines a product inputopening. Theflow structure is operative to direct the received granular materialsubstantially equallyinto each of the product input openings.