Spray apparatus comprising at least one nozzle (14), a source of spray chemical connected via pipework (12) to the at least one nozzle (14), a high pressure fluid system (20) connected to the at least one nozzle (14) via a pressure reducing means (26) adjacent the at least one nozzle whereby low pressure fluid is fed to the at least one nozzle together with spray chemical to produce an atomised spray output.
