Abstract: A support assembly for a spray nozzle specifically structured to deliver liquid and/or cleaning chemicals under high pressure to air conditioning coils of large commercial-type air conditioning units for the cleaning thereof in order to render operation of the entire air conditioning assembly more efficient. The spray nozzle is adjustably and removably positioned relative to the air conditioning coils being cleaned thereby eliminating the need for personnel to physically handle and position the spray nozzle during the cleaning process wherein the presence of personnel is extremely costly as well as being dangerous and hazardous to the health of the personnel due to the enclosed and resulting harsh environmental conditions under which such cleaning of air conditioning coils normally takes place.