Ingrid Bauer/Jean-Claude Catry wrote:

>< and an under-the-sink "brick"
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>>style filter for drinking water.>
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> what system is a brick filter ?
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Informally termed a "brick" it is a relatively small (about the size of
a clay brick), dense, multi-layer water filter (often a cylinder)
usually consisting of a carbon filter section and a mechanical filter
made to block particles larger than 1-2 microns or so. These can be used
in above- or below-the-sink situations and are usually for low-volume
such as for drinking/ cooking water.