Water level cut-off switches; control apparatus for controlling water loss from home water installations, namely, leak detecting devices consisting of water flow sensor, control unit with processor for comparing regular water flow values to signals provided by a water flow sensor and with audible and/or visible alarm and/or transmitter for transmitting an alarm signal, and water valves; control apparatus for controlling water loss from home water installations comprised of water flow sensors, processors for processing signals from water flow sensors, audible and/or visible alarms, stop valves, connection fittings and flanges; pressure reducing valves for the control of the operating pressure in gas installations, including those for industrial use; differential pressure control systems for water and gas installations comprised of pressure sensors, shut-off valves, computer software and computer hardware

Fittings to protect drinking water installations from leaking, namely, processor controlled stop valves; pressure reducer/filter combinations with and without backwashing for pressure control and filtering of drinking water of public drinking water networks in buildings; automatic backwashing units for filters for pressure control and filtering of drinking water of public drinking water networks in buildings; filters for drinking water installations; physical water treatment devices using electricity for physical water treatment; filters and filtration units for water treatment against limestone and for the control of water losses in domestic water installations, including those for industrial use; pressure reducing valves for the control of the operating pressure in water installations, including those for industrial use; thermostatic mixing valve for the control of the warm water temperature; pressure relief and safety valves for heating systems, solar heating installations and closed drinking water heaters; closed-circuit water heating systems comprised of water boiler, water filters, water supply fittings, pipe disconnectors for filling and refilling a closed circuit water heating system, manometers, expansion vessels, heat sources and valves; boiler combination valve for removal of entrained air from water installations; filling assemblies for home water installations comprised of valves, pipe disconnectors, filters, water flow sensors, safety valves, fittings and flanges; thermal safety valves for heating installations