Abstract: A header, a rotating head and a base piece are sequentially mounted on the end of a stand pipe. Water hoses attach to threaded connections in the header. Channels in the header and rotating head supply water from the water hoses to number of passages, that in turn carry water to a number of nozzles located along an outer face of the rotating head. The nozzles are pointed so as to create water jets, which break up material on the floor of a septic tank and generate a torque in the rotating head that turns it about the stand pipe. Spring-loaded legs on the base fold up to allow the apparatus to be inserted through an opening in the septic tank, then extend outward to provide a stable stand. An extension fits over the opening in the septic tank and effectively raises the opening of the septic tank to ground level. A cap covers the extension when not in use.