A water purifier for the purification of pressurized water includes a filter chamber (16) with a cylindrical adsorption filter (17), a UV chamber (19) that is provided inside the adsorption filter (17), an incoming water intake (15) to the filter chamber (16), a spout (20) emanating from the filter chamber (16) for the discharge of water from the filter chamber (16), a space (11) laterally displaced relative to the filter chamber (16), components for the control of the function of the water purifier being received in the space (11), an upper demountable part (3) and a lower demountable part (5). The connection of the incoming water is made to a central main portion (1) of the water purifier, that the discharge of the purified water is effected from the central main portion (1), and that the central main portion (1) is located between the demountable parts (3, 5).