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Home / Products / Heating Water Filter, Magnetic Sludge Separator FDM-2B 3/4
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Heating water filter, heating system filter, magnetic sludge separator filter FDM-2B

with 3/4" brass thread

The heating water filter removes magnetic and non-magnetic particles, especially corrosion deposits loosened in older heating systems.
Contaminants from heating, cooling, and solar systems. Iron-containing contaminants, as well as non-magnetic contaminants and sludge, are filtered out of the heating water.

"Highest quality - 10-year guarantee - Made in Italy - No cheap imports from China!"

A magnetic sludge separator (heating water filter) offers a range of benefits for heating systems - especially water-based systems with radiators or underfloor heating. Here is an overview of the main advantages and benefits:


🔧 Advantages of a magnetic sludge separator:

  1. Removal of magnetic particles (e.g. B. iron oxides / magnetite):

    • Prevents deposits from forming in radiators, heat exchangers, and valves.

    • Protects sensitive components such as circulation pumps and heating valves.

  2. Protection against corrosion:

    • Iron particles promote corrosion in the heating system. A filter significantly reduces this effect.

  3. Improved heating system efficiency:

    • Fewer deposits = better heat transfer.

    • Fuel consumption can decrease because the system runs more efficiently.

  4. Longer heating system lifespan:

    • Less wear thanks to clean heating water.

    • Saves on repair and maintenance costs in the long term.

  5. Easy maintenance:

    • Most filters can be cleaned or flushed with little effort.

    • The magnets can simply be removed for cleaning.

  6. Improved water quality:

    • Also protects against non-magnetic suspended particles (with combination filters).

    • Helps meet VDI 2035 recommendations for water quality in heating systems.

  7. Ideal for renovations or retrofits:

    • Particularly recommended for older systems with steel pipes or cast-iron radiators.


✅ Practical benefits:

  • Fewer malfunctions and breakdowns.

  • Less maintenance work for service professionals.

  • More sustainable heating system operation - environmentally and economically.

  • A worthwhile investment for new systems or as a retrofit.



Technical specifications:

3/4" brass connection
Housing and cover: Reinforced polyamide PA66
Filter element: Stainless steel AISI 304 L
O-rings: EPDM
Drain thread: Brass CW 614 N - 1"
Magnet: NdFeB - 4500 Gauss - Brass magnet holder CW 617 N
Magnet holder: Polypropylene
Filtration rating: 500 μm


Dimensions: 135 x 180 x 70 mm (H x W x D)
Operating pressure: maximum 3.0 bar
Temperature range: 4 - 90 °C

Applications: Heating system protection filter

You will receive one FDM-2B heating system protection filter.