According to the applicable guidelines VDI, SWKI, and Ö-Norm, filling water for heating systems must be pre-treated to prevent mineral deposits. Even at low hardness levels, modern devices such as gas wall boilers, heat pumps, and solar systems can suffer damage from limescale precipitation. With the new PURE H2O demineralization cartridges from ROTHENBERGER, compliant filling of heating systems according to VDI 2035 is quick and straightforward. Installers can use the cartridges during new installations and servicing to remove harmful minerals from the filling water. The plug-and-play system of the PURE H2O cartridges automatically regulates all relevant parameters to supply the systems with technical water in accordance with standards. This provides an easy-to-install system that does not require additional devices for quality testing.