Water treatment device

The present disclosure concerns a device for treating water of the kind intended for treating running water from a domestic water supply system or other sources of pressurized water, to obtain filtered or treated water, for example, of drinking water quality. The water treatment device comprises a housing with a running water inlet and a treated water outlet, the housing defining: two or more cylindrical water treatment compartments, each having a longitudinal axis and having a water compartment inlet and a water compartment outlet, the treatment compartments being arranged in parallel one to the other; a water inlet-manifold having an inlet-manifold ingress in liquid communication with said running water inlet, and at least two inlet-manifold egresses, each of the egresses being in liquid communication with one of the water compartment inlets; a water outlet-manifold having an outlet-manifold egress in liquid communication with the treated water outlet, and at least two outlet-manifold ingresses, each of the ingresses being in liquid communication with the water compartment outlets; each of the two or more water treatment compartments comprising: a first water treatment medium in the form of a tubular porous block having a tubular block diameter, and formed about an axial lumen having a lumen diameter, the ratio between the block diameter and the lumen diameter being between 1.5 and 2, and a second water treatment medium enveloping the first water treatment medium, the second water treatment media being in the form of a pleated fibrous sheet.