FIELD: filtration.
SUBSTANCE: invention relates to filtration. Composite filter cartridge (200) and a water purification system in which said cartridge is used are proposed. Composite filter cartridge (200) comprises outer shell (20) in which chamber (21) is formed, outer shell (20) being provided with raw water inlet (22), outlet (23) for pre-treated water, inlet (24) for pre-treated water, purified water outlet (25) and sewage outlet (26) that are in communication with chamber (21); prefilter filter cartridge (100); central tube (30), filter membrane (40), and a control element, which is connected to pre-treated water outlet (23) and inlet (24) for pre-treated water. When composite filter cartridge (200) is used for the first time, the control element includes raw water inlet (22) and outlet (23) for pre-treated water and turns off inlet (24) for the pre-treated water.
EFFECT: technical result is the simplicity of design, ease of operation.
10 cl, 9 dwg
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