Abstract: An apparatus for cleaning tanks which is inserted into an opening at the top of the tank to be cleaned. The apparatus has an elongated cylindrical housing with an upper fluid inlet portion and a lower portion having a cylindrical rotary member coupled for rotation to the housing. The apparatus includes an air motor in the upper portion. In the lower portion, the main component is a high pressure block with an elongated axial aperture and a plurality of feed tubes disposed parallel to the axial aperture are held by the block. There is a central rotating vertical main tube in the central aperture which carries high pressure liquid. At the end of the high pressure block is a bevel housing gear and a nozzle tube is coupled at right angles to the central vertical tube. This nozzle tube has vertically disposed spray nozzles at one end and a bevel gear at the other end which is engaged with the bevel housing gear.