The Sendary ultra pure water equipment system mainly adopts fully automatic reverse osmosis+electro deionization (EDI)+polishing mixed bed ultra pure water treatment technology, with pre treatment and reverse osmosis treatment to effectively remove various salts and impurities in the water. Then, CEDI and polishing mixed bed system are used to further improve the water quality and ensure that the effluent meets the requirements of the water use process. The ultra pure water equipment system adopts fully automatic control, which has the advantages of stable water quality, easy operation, low operating costs, green environmental protection, and easy maintenance. The products are widely used in key industries such as universities, scientific research, pharmaceutical factories, power, electronics, medical treatment, disease control, environmental supervision, and technical supervision. Precautions for ultra pure water equipment using tap water as the source water.