"Fitted to supplement the faulty expansion vessel in my combi boiler. The system was opening the safety valve when the heating hot. The system now stays pressurised! Although this is quite big, there is a surprising amount of wasted space in the back of a kitchen corner cabinet under the work surface. The matching bracket is good, but you will need some different screws from those supplied if you are fitting to a chipboard cupboard. The part supplied to me was "Reflex NG" by the German company Reflex Winkelmann."