Connection pressurized water supply network comprises a flap valve in the upstream circuit which is closed when the two circuits are apart and can be opened by a butterfly nut placed on the downstream circuit

摘要

System comprises a upstream circuit (2) and a downstream circuit (3) linked by a connection. The connection comprises a flap valve (5) in the upstream circuit which is closed when the two circuits are apart and can be opened by a butterfly nut (6) placed on the downstream circuit. An Independent claim is also included for a water supply meter.