The TE-range filters (for water treatment) are equipped with a diffuser tube (cf. photograph opposite) for granules (for activated carbon, polyphosphates etc.).
The significant volume of the hood, the internal mechanism studied to ensure that water passes over the entire height of the bed and also the exceptional quality of the activated carbon make this one of the most efficient systems on the market.

The DUO NW25 combines pre-filtration and activated carbon treatment.