A scalable home automation system comprising a plurality of connected devices and a system network, the said scalable home automation system being intended for the monitoring, management and control of a sanitary facility and elements constituting said sanitary facility by means of the said plurality of connected devices communicating together through a system network, the said system network physically comprising one or more sub-networks each of one of the following types • wireless; • wired; • mobile; and in which each of the plurality of connected devices includes hardware and software means for transmitting and receiving data over the Internet network through the system network, - each of the plurality of connected devices comprising an electronic interface (1-A, 1-B, 1-C or 1-D) comprising • a logic processing unit (1-A4, 1-B4, 1-C4 or 1-D4) executing software to perform its function(s); • hardware and software means configured to transmit and receive data via the system network with all other connected devices; • hardware and software means configured to transmit and receive data via the system network with remote terminals connected to the Internet; • hardware and software means configured to perform their function(s) using data communicated by other connected devices of the plurality of connected devices; • hardware and software configured to perform their function(s) using data or commands supplied by remote terminals connected to the Internet; • hardware and software means configured to transmit alert or information messages to remote terminals. - each of the plurality of connected devices being taken from an actuator sensor (2-C, 9-4) and/or a single-break sanitary sewer and/or a multi-break sanitary sewer (3-C) and/or a single-break modular sanitary sewer (4-F) and/or a multi-break modular sanitary sewer (4-C, 9-12) and/or a tap (5A, 5B, 5C, 5D, 9-16) and/or a drain plug (6-B, 6-C, 9-17) and/or a float valve (7A, 9-18) and/or sanitary equipment (8B-0, 9-13) and/or a humidity sensor (8A, 8B-2, 9-14), each of the plurality of connected devices integrating an interface (1-A, 1-B, 1-C or 1-D) configured to: ∘ transmit on the system network information about its operating status and its use of water; ∘ modify its operation according to the information it receives from the other connected devices; ∘ be controllable by means of remote terminals. • wireless; • wired; • mobile; - each of the plurality of connected devices comprising an electronic interface (1-A, 1-B, 1-C or 1-D) comprising • a logic processing unit (1-A4, 1-B4, 1-C4 or 1-D4) executing software to perform its function(s); • hardware and software means configured to transmit and receive data via the system network with all other connected devices; • hardware and software means configured to transmit and receive data via the system network with remote terminals connected to the Internet; • hardware and software means configured to perform their function(s) using data communicated by other connected devices of the plurality of connected devices; • hardware and software configured to perform their function(s) using data or commands supplied by remote terminals connected to the Internet; • hardware and software means configured to transmit alert or information messages to remote terminals. • a logic processing unit (1-A4, 1-B4, 1-C4 or 1-D4) executing software to perform its function(s); • hardware and software means configured to transmit and receive data via the system network with all other connected devices; • hardware and software means configured to transmit and receive data via the system network with remote terminals connected to the Internet; • hardware and software means configured to perform their function(s) using data communicated by other connected devices of the plurality of connected devices; • hardware and software configured to perform their function(s) using data or commands supplied by remote terminals connected to the Internet; • hardware and software means configured to transmit alert or information messages to remote terminals. - each of the plurality of connected devices being taken from an actuator sensor (2-C, 9-4) and/or a single-break sanitary sewer and/or a multi-break sanitary sewer (3-C) and/or a single-break modular sanitary sewer (4-F) and/or a multi-break modular sanitary sewer (4-C, 9-12) and/or a tap (5A, 5B, 5C, 5D, 9-16) and/or a drain plug (6-B, 6-C, 9-17) and/or a float valve (7A, 9-18) and/or sanitary equipment (8B-0, 9-13) and/or a humidity sensor (8A, 8B-2, 9-14), each of the plurality of connected devices integrating an interface (1-A, 1-B, 1-C or 1-D) configured to: ∘ transmit on the system network information about its operating status and its use of water; ∘ modify its operation according to the information it receives from the other connected devices; ∘ be controllable by means of remote terminals. ∘ transmit on the system network information about its operating status and its use of water; ∘ modify its operation according to the information it receives from the other connected devices; ∘ be controllable by means of remote terminals.