Mounting module (100), which, for the purpose of preparing the installation of a washbasin, can be moved against a wall as a coherent mounting unit and set up in front of it, the mounting module comprising a module frame (1) with longitudinal struts (11) extending in the vertical direction (Z) and transverse struts (12) extending in the transverse direction (Y), on which a fixing device (13) for fixing the washbasin as well as a first bracket for holding a washbasin cold water connection (73) and a second bracket for holding a washbasin hot water connection (83) are arranged, characterized in that a central cold water connection (2), a cold water
distributor (7) and a cold
water supply connection (74), to which a cold water line (700) of a residential unit can be connected, are fixed to the module frame (1) and the washbasin cold water connection (73) is held on the first bracket.wherein the central cold water connection (2) is designed for connection to a cold water line of a house and is fluid-carrying connected or connectable to the cold water
distributor (7) and the cold water
distributor (7) has a first outlet which is fluid-carrying connected or connectable to the washbasin cold water connection (73) and has a second outlet which is fluid-carrying connected or connectable to the cold
water supply connection (74), wherein , i) the cold water distributor has a third outlet designed as a connection for a sanitary element, in particular an instantaneous
water heater, which can be attached to the module frame (1), and the mounting module (100) has a width in the transverse direction (Y) of less than 70 cm, in particular less than 60 cm, and of at least 40 cm, and in particular has a height of more than 70 cm but less than 150 cm, and / or ii) the cold water distributor (7) is arranged in the transverse direction (Y) between the central cold water connection (2) and the second support and / or the cold water distributor (7) has an outlet distribution unit (71) which forms the first and the second outlet of the cold water distributor (7) and is in particular held on the first support, wherein the first outlet forms the washbasin cold water connection (73), wherein in particular the outlet distribution unit (71) is designed as a single-piece integrated unit which can be reversibly disassembled and assembled from the module frame (1), and / or iii) the cold
water supply connection (74) and the central cold water connection (2) are spaced at least 50 cm, in particular at least 60 cm, in particular at least 70 cm, apart in the vertical direction (Z) from a vertically lower end of the mounting module (100).