Abstract: A color shade changing unit module for a painting installation is provided including a generally parallelepiped-shaped part, a bore formed in the part, a central channel into which the bore converges, the channel being perpendicular to end faces of the module, a valve housed in the bore, the valve including a closing element, a chamber formed in the part, a paint feed channel and a paint return channel leading into the chamber and leading out onto a side face of the module generally opposite from a wall in which the bore is formed, the closing element of the valve being designed, depending on a position of the closing element, to isolate, or to connect the central channel and the paint feed and paint return channels, and also including external pipes, connectors which connect the paint feed and paint return channels to the external pipes, each such connector having an externally threaded first, smaller-diameter part designed to screw into the external pipe, and a second, larger-diameter part surrounded by at

Abstract: The invention concerns a module (1) generally parallelepiped in shape, comprising parts (7) wherein emerge at least two bores (8) converging towards a central channel (8) and perpendicular to the end surfaces (2, 3) of the module, and which emerge likewise in said channel (9). Each bore (8) nets as housing for a gate valve (10) whereof the disc (10) is designed, depending on its position, in isolating or in communicating with the central channel, a chamber wherein emerge two channels respectively supplying paint and transporting paint back to the reservoir (17). Each paint supplying or recuperating channel is connected to an outer conduit (17) via a connection (21) comprising a first externally threaded part (20) designed to be urged to be screwed into a conduit (17) and a second part (18) with larger diameter, enclosed by a joint (19) designed to be urged to be tightly interlocked in a well (16) provided in the module (1), in the bottom of which emerges a paint supplying or recuperating channel (12, 13).