Filter cartridge

A gravity-based water filtration cartridge comprising:

• a cartridge body (10) comprising a holder (12) at its top for attachment of a first filtration element (14), a sidewall (16) enclosing the cartridge body (10), and optionally a connection port (20) at its bottom;
• a first filtration element (14) for receiving unfiltered water, wherein the first filtration element is attached to the holder (12);
• a second filtration element (24) for receiving water from the first filtration element (14), wherein the second filtration element (24) is positioned within the cartridge body (10) and wherein the water permeability of first filtration element (14) is lower than the water permeability of the second filtration element (24);
• and
• a pressure equalization chamber (30) within the cartridge body (10) below the first filtration element (14) and above the second filtration element (24) wherein the sidewall (16) enclosing the chamber (30) comprises at least one opening (32a, 32b) extending from the chamber (30) through the sidewall (16) such that pressure equalization between the chamber (30) and the outside of the cartridge body (10) is provided.