Drinking water installation with a leakage protection assembly, comprising (a) a fitting portion (14, 16, 18, 20; 230; 234, 236; 312; 412) installed upstream of one or more tap points (306, 308); (b) a turbine or another flow meter (72; 110; 160; 256; 280; 300) arranged in the fitting portion the flow meter generating signals representing the flow through the fitting portion, (c) a shut-off valve (50; 107; 128; 148; 260; 296; 318; 418) for interrupting the water supply in the drinking water installation; and (d) a control device (10; 210; 320; 420) with a signal processing device fed with signals from the turbine or the other flow meter (72; 110; 160; 256; 280; 300) for determining non-typical and/or unwanted flow conditions in the water installation and for operating the shut-off valve (50; 107; 128; 148; 260; 296; 318; 418); wherein (e) the control device (10; 210; 320; 420) is provided with a communication unit by means of which the leakage protection assembly can be adjusted by remote control with a user end device having a communication unit; (f) a central network server with a computer program is provided for the communication of the communication unit of the user end device and the communication unit of the control device (10; 210; 320; 420), and (g) at least one further fitting portion (14, 16, 18, 20; 234, 236; 312; 412) with a control device with a communication unit and with a flow meter (72; 110; 160; 256; 280; 300) and a shut-off valve (50; 107; 128; 148; 260; 296; 318; 418) is provided in the drinking water installation upstream of one or more tap points (306, 308); characterized in that (h) an additional communication of the control devices (10; 210; 320; 420) amongst each other and with the central server can be established with the communication unit of the control device, wherein (i) one of the fitting portions (20; 234, 236; 254) with the control device is provided centrally in the range of the water supply of a water installation and all the other fitting portions (14, 16, 18, 230; 312; 412) are designed to be installed hydraulically downstream thereof, and (j) the control device of the fitting portion for installing centrally in the range of the water supply determines by communication of the control devices amongst each other if a very large flow volume was caused by the simultaneous tapping at several tap points or by a water loss at only one point. (a) a fitting portion (14, 16, 18, 20; 230; 234, 236; 312; 412) installed upstream of one or more tap points (306, 308); (b) a turbine or another flow meter (72; 110; 160; 256; 280; 300) arranged in the fitting portion the flow meter generating signals representing the flow through the fitting portion, (c) a shut-off valve (50; 107; 128; 148; 260; 296; 318; 418) for interrupting the water supply in the drinking water installation; and (d) a control device (10; 210; 320; 420) with a signal processing device fed with signals from the turbine or the other flow meter (72; 110; 160; 256; 280; 300) for determining non-typical and/or unwanted flow conditions in the water installation and for operating the shut-off valve (50; 107; 128; 148; 260; 296; 318; 418); wherein (e) the control device (10; 210; 320; 420) is provided with a communication unit by means of which the leakage protection assembly can be adjusted by remote control with a user end device having a communication unit; (f) a central network server with a computer program is provided for the communication of the communication unit of the user end device and the communication unit of the control device (10; 210; 320; 420), and (g) at least one further fitting portion (14, 16, 18, 20; 234, 236; 312; 412) with a control device with a communication unit and with a flow meter (72; 110; 160; 256; 280; 300) and a shut-off valve (50; 107; 128; 148; 260; 296; 318; 418) is provided in the drinking water installation upstream of one or more tap points (306, 308); characterized in that (h) an additional communication of the control devices (10; 210; 320; 420) amongst each other and with the central server can be established with the communication unit of the control device, wherein (i) one of the fitting portions (20; 234, 236; 254) with the control device is provided centrally in the range of the water supply of a water installation and all the other fitting portions (14, 16, 18, 230; 312; 412) are designed to be installed hydraulically downstream thereof, and (j) the control device of the fitting portion for installing centrally in the range of the water supply determines by communication of the control devices amongst each other if a very large flow volume was caused by the simultaneous tapping at several tap points or by a water loss at only one point.