HERZ heating refilling station, complete, consisting of system separator, pressure reducer, manometer and refilling unit with water flow meter for filling and operation of heating systems according to VDI2035 and ÖNORM H5195. With the mixture of selected ion exchange resins, the water is considerably softened and the pH value is raised to between 8.2 and 8.7 in the alkaline range. However, because corrosive ions such as chloride and sulphate are also removed, lasting corrosion protection is achieved even without chemical inhibitors. Forged brass body, max. operating pressure 6 bar, temperature max. 65°C.