Apparatus for treating a papermaking suspension which includes an elevated receiver mounted at the top of a pedestal structure, there being a plurality of generally vertically oriented cleaners connected at the underside of the receiver and the pedestal structure providing conduit means through which the suspension to be cleaned is conveyed to the cleaners, rejected stock from the cleaners being returned to a subsequent cleaning operation and through which cleaned deaerated stock can be conveyed from the receiver to a point of use such as a papermaking machine.
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