Comparison BRITA Maxtra+ Universal 1x vs BRITA Maxtra 4x

The number of individual cartridges in the delivery set.

There can be more than one cartridge in a set; the meaning of such a configuration directly depends on the application (see the relevant paragraph). So, each cartridge is usually responsible for its own filtration stage in flow systems, they are installed simultaneously (in series) and the number of cartridges more or less corresponds to the number of purification stages (see the relevant paragraph). And in the case of filter jugs, the sets consist of several cartridges of the same type and are intended for those who want to buy several replacement elements in reserve (or equip several jugs with the same cartridges at once). However, buying a set can be more convenient anyway, if not profitable, than buying filter elements separately.

Now on the market there are sets with the following number of cartridges: 1 cartridge, 2 cartridges, 3 cartridges and 4 cartridges and more.