Abstract: A chamber cleaning apparatus and method includes a conduit for conducting fluid into the chamber; a nozzle assembly, connected to the conduit, for creating one of an axial fluid spray to clean the interior surfaces of the first and second end walls of the chamber and a transverse fluid spray to clean the interior surfaces of the side walls of the chamber; a rotational drive assembly for rotating the nozzle means about a rotational axis generally parallel or coaxial with the longitudinal axis of the chamber; an axial drive assembly for moving the nozzle means a preselected distance toward or away from the first end wall of the chamber for each rotation of the nozzle assembly; a transverse drive assembly for moving the nozzle assembly a preselected transverse distance toward or away from the rotational axis for each rotation of the nozzle assembly. A swivel is provided having an outer sleeve body and an inner sleeve body with the inner sleeve body coaxially and rotatably positionable in the outer sleeve body.