Nitrate filters VGX-N – well water nitrate reduction

The VGX-N nitrate filters are used to reduce nitrates in well water. The compact system uses the principle of ion exchange to provide water that corresponds to the reference value in the German Drinking Water Ordinance. The compact single system, which is controlled by an integrated water meter, is regenerated with sodium chloride.

For private water supplies, a combination with chlorine dioxide dosing GENODOS® type DM-B or chlorine dosing GENODOS® type DM-T for germ reduction is recommended.

  • Compact single system
  • For homes of 1 to 2 families
  • Volume control
  • Blending unit

Installation requirements

Please note local installation directives, general guidelines and technical specifications. VGX-N nitrate filters must be protected in accordance with DIN EN 1717 (e.g. system separator GENO®-DK 2). A drinking water filter must be installed upstream of the system (e. g. BOXER®). VGX-N nitrate filters may only be sold following consultation with Grünbeck. A water analysis is required. In the case of nitrate reduction in the drinking water (raw water), the specifications of the German Drinking Water Ordinance – max. 250 mg/l chloride – must be observed, and the admixing of raw water must be taken into account where appropriate. The installation site must be frost-proof. The system must be protected against chemicals, dyes, solvents and vapours.

Scope of supply

Nitrate filter VGX-N including

  • Connection technology, water test kit and “Nitrate”


As standard, the VGX-N nitrate filters are fitted with the EXAcount interface. This interface permits the operation of a dosing system without additional turbine water meter to protect galvanised pipes against corrosion and to protect copper pipes by means of alkalinisation or to stabilise hardness. 

  • Dosing computer EXADOS® EK 6 – GSX / VGX
  • Dosing computer EXADOS® ES 6 – GSX / VGX
  • Replacement water test kit “Nitrate”
  • Regeneration salt in acc. with EN 973 type Am, 25 kg sack
  • Water stop G 1
  • Regeneration water delivery pump 
  • Drain connection DN 50 in accordance with DIN EN 1717 for small water softeners
  • M-bus measuring transducer D-DAM 
  • Extension set for connection hose 
  • 90° connection angle - 1" (2 pieces)
  • Double screw connection G1 ¼ 

For further information on installation requirements and accessories, as well as technical details, see the product data sheet, which is available to download.