Reliable filtration & protection

The Grünbeck fine filter BOXER KDX

The BOXER KDX fine filters are designed for the filtration of drinking water. The fine filter BOXER KDX with pressure reducer is additionally suitable for adjusting the holding pressure on the withdrawal side. The BOXER KDX fine filters are designed according to the specifications of DIN EN 13443-1 and DIN 19628 and are intended for installation into the drinking water system according to DIN EN 806-2 (installation immediately downstream of the water meter system).

BOXER KDX fine filter to protect the domestic water system

They protect the water pipes and connected water-carrying system parts from disturbances and corrosion damage due to undissolved impurities (particles), such as rust particles, sand, etc. The unfiltered drinking water flows into the filter from the inlet side and then from the outside in through the filter cartridge and to the pure water outlet. In doing so, foreign particles with a size of > 100 μm are retained. According to DIN EN 806-2, the filter cartridge must be replaced every 6 months at the latest. Depending on their size and weight, the foreign particles either stick to the filter cartridge, or they fall straight down into the filter cylinder.

By means of the flow-optimised pressure reducer of the BOXER KDX fine filter, which is designed according to DIN EN 1567, the outlet pressure on the withdrawal side can, in addition, be set to 1 – 6 bar (factory setting: 4 bar).



  • Connection flange incl. water meter screw connections (made of dezincification-resistant brass) with seals and stainless steel screws
  • Supporting fabric made of high-grade plastic for long-term use
  • Maintenance ring for setting the next maintenance date (filter change)
  • Transparent blue filter cylinder that can be tightened by hand
  • Replaceable filter cartridge made of polyester fabric (filter fineness 100 µm in the standard version; 80 µm, 50 µm, 20 µm and 5 µm retrofitting possible)
  • All water contacting parts comply with the German Drinking Water Ordinance. Test regulations: KTW, DVGW W 270, DIN 50930-6
  • In order to set and indicate the after-pressure on the outlet side, a pressure reducer with pressure gauge is integrated in the filter head of the BOXER KDX.
  • All materials are recyclable

Technical specifications

3/4" 1" 1 1/4"
Flow capacity BOXER KDX, according to DIN EN 1567 [m³/h] 2.3 3.6 5.8
Installation length without screw connections [mm] 100 100 100
Installation length with screw connections [mm] 185 182 191
Overall height BOXER KDX [mm] 277 277 277
Order no. BOXER KDX 101815 101820 101825