Pressurized medium sprayer - has pump, mixer, spray pipe and nozzle selector switch

Device for spraying pressurised medium, particularly water optionally with added chemicals, comprises a pump, a mixing device and a spray pipe, at the end of which are fixed at least two nozzles which can be selectively connected to the pipe by a change-over switch. Pref. the switch has a cylindrical cavity communicating via bores with the nozzles and the spray pipe, housing a slide to establish a path from the pipe to one or the other nozzle. Application is e.g. to cleaning, de-rusting, phosphatizing, disinfecting, etc. Different types of spray can be directly selected one after the other so that the working process is not interrupted.