Reverse flter cleaning drum vacuum system. The Spillrite reverse filter cleaning power head is attached top a galvanised steel open top drum lid. When the drum vacuum is supplied with the specified volume of compressed air the power head turns a steel drum into an industrial vacuum capable of recovering most types of dry waste. With turn of the valve the air flow is reversed into the filter cartridge and blasts the accumulated dusts, powders and dry waste that clogs the filter away from the filter and into the basde of the drum.