Rothenberger 1500004350 Demineralization Cartridge for Heating System Fill Water Treatment

Where ordinary water softeners merely exchange ions, the Rothenberger 1500004350 demineralization cartridge deploys high-capacity mixed-bed resin to strip both calcium and magnesium down to residual hardness below 0.1 °dH. This ensures fill and top-up water for heating systems meets VDI 2035 requirements, preventing limescale and corrosion in condensing boilers and heat pumps.

Highlights

• High-performance mixed-bed resin delivers fully demineralized water with conductivity under 100 µS/cm
• Generous capacity: up to 3000 liters at 10 °dH or 1500 liters at 20 °dH input hardness
• Integrated pH stabilization protects system components from acidic or alkaline corrosion
• Quick connection via R 3/4" internal thread for tool-free installation on Rothenberger ROFILL filling stations
• Disposable design eliminates regeneration chemicals and maintenance downtime

In daily use

Heating engineers and facility managers rely on this cartridge to condition fill and top-up water directly at the point of entry. The robust plastic housing withstands operating pressures up to 6 bar and temperatures up to 60 °C, while the high flow rate of 1000 l/h ensures rapid filling without compromising water quality. Simply connect the cartridge to a compatible ROFILL station, monitor the integrated conductivity indicator, and replace the cartridge when the resin is exhausted—no backwashing or chemical handling required.

Full specifications

• Product type: Demineralization cartridge
• Application: Heating system fill water treatment
• Filtration method: Ion exchange (mixed-bed resin)
• Capacity at 10 °dH: 3000 liters
• Capacity at 20 °dH: 1500 liters
• Residual hardness after treatment: < 0.1 °dH
• Conductivity after treatment: < 100 µS/cm
• Connection thread: R 3/4" internal thread
• Max. flow rate: 1000 l/h
• Max. operating temperature: 60 °C
• Max. operating pressure: 6 bar
• Compliance standard: VDI 2035
• Exchange medium: High-performance mixed-bed resin
• Regenerable: No (disposable)
• Compatibility: Rothenberger ROFILL filling stations
• Housing material: High-quality plastic
• pH stabilization: Yes

Final note

For heating systems where water quality is non-negotiable, this cartridge delivers consistent, fully demineralized water with minimal effort—protecting your investment and extending equipment life.