The present invention is a water purifier consisting of a water purifier body and a removable filter cartridge, wherein the water purifier body includes a main body substrate on which necessary parts of the water purifier are installed; And a plurality of coupling pin holders on the inner edge of which the rear is cut to accommodate the hexahedron filter cartridge, and which is coupled to a plurality of coupling pins for easy assembly by accommodating and fixing the main body substrate. It is to provide a DIY assembly type water purifier including two body cases. The DIY assembled water purifier of the present invention can easily and easily assemble and install a water purifier at a low cost and easily replace the filter as well as reduce the manpower and cost of reassembling when defective items are found in the performance test process. There are advantages.
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