A cleaning device for a filter press

A cleaning device for a filter press comprises a spray tube (27), mounted for pivotting about an axis (28) between a horizontal position above the filter press plates and a vertical position between separated plates. The spray tube is moved along the press from one pair of separated plates to the next on a carriage (4), while in its horizontal position, then pivotted to the vertical position and moved across the press between two plates on a second carriage (20), which runs on rails across the carriage (4). The carriages and spray tube may be lifted from rails (9) along one filter press and mounted on corresponding rails on another press, as required, so that one cleaning device serves several presses. When tube (27) is horizontal it lies within the width and height of carriage (4).