A liquid filtering equipment, in particular water, comprising membrane filtering modules, vertically arranged in at least one row, the modules having their parallel vertical centre lines located in a same plane, said modules being connected by pipings to valves for controlling the liquid flows to and from the modules, the liquid filtering equipment comprising - a first block formed by an assembly of membrane filtering modules, each module including: • a lower axial tap for feeding the liquid to be treated (L1-L4), • an upper axial tap for filtrate or retentate (H1-H4), and • an upper side tap for retentate or filtrate, the assembly including at least: • a feed lower collector CA, • a filtrate or retentate upper collector CF, • and a retentate or filtrate upper side collector • the collectors CA, CF are attached in a frame 1, the centre-to-centre spacing E between the centre lines of the collectors CA, CF being fixed - a second block formed by a system of valves, the system of valves being arranged in a framework in a fixed configuration, and - a third block formed by a group of intermediate pipings making up an interface between the system of valves and the assembly of modules, characterised in that: - only the interface is to be changed upon changing types of filtering modules, whereas the system of valves and the assembly of modules, apart from changing the type of modules, remain unchanged, - and in that the frame of the assembly of modules is adapted to receive at least two types of modules namely - a first type with an upper axial tap for the filtrate and a side tap for the retentate, and - a second type with an upper axial tap for the retentate and a side tap for the filtrate, - switching from one type to the other causing a changeover of the functions of the collectors, - and in that at least one group of intermediate pipings associated with each type of said modules respectively, is provided to be placed in a dismountable manner between the assembly of modules and the system of valves and ensure changeover of the collectors according to the type of modules. - a first block formed by an assembly of membrane filtering modules, each module including: • a lower axial tap for feeding the liquid to be treated (L1-L4), • an upper axial tap for filtrate or retentate (H1-H4), and • an upper side tap for retentate or filtrate, the assembly including at least: • a feed lower collector CA, • a filtrate or retentate upper collector CF, • and a retentate or filtrate upper side collector • the collectors CA, CF are attached in a frame 1, the centre-to-centre spacing E between the centre lines of the collectors CA, CF being fixed • a lower axial tap for feeding the liquid to be treated (L1-L4), • an upper axial tap for filtrate or retentate (H1-H4), and • an upper side tap for retentate or filtrate, • a feed lower collector CA, • a filtrate or retentate upper collector CF, • and a retentate or filtrate upper side collector • the collectors CA, CF are attached in a frame 1, the centre-to-centre spacing E between the centre lines of the collectors CA, CF being fixed - a second block formed by a system of valves, the system of valves being arranged in a framework in a fixed configuration, and - a third block formed by a group of intermediate pipings making up an interface between the system of valves and the assembly of modules, - only the interface is to be changed upon changing types of filtering modules, whereas the system of valves and the assembly of modules, apart from changing the type of modules, remain unchanged, - and in that the frame of the assembly of modules is adapted to receive at least two types of modules namely - a first type with an upper axial tap for the filtrate and a side tap for the retentate, and - a second type with an upper axial tap for the retentate and a side tap for the filtrate, - switching from one type to the other causing a changeover of the functions of the collectors, - and in that at least one group of intermediate pipings associated with each type of said modules respectively, is provided to be placed in a dismountable manner between the assembly of modules and the system of valves and ensure changeover of the collectors according to the type of modules.