Abstract: An improvement in packing plant by-products chillers which have an elongated revolvable cylindrical tank open at both ends for introduction of slaughterhouse by-products in one end, passing the same through the cylindrical tank while revolving the same and simultaneously moving chilled water therethrough, said improvements comprising a knife slashing the unit for use in association with the entry into said chiller, a strainer unit in association with the drain of liquid coolant from said unit, and an associated float valve for controlling liquid level pressure and flow within the system.