Because there is a pretreatment in front of the reverse osmosis system, the pretreatment is to pre treat the raw water to meet the requirements of the reverse osmosis system for the raw water quality.
High temperature resistant needle felt
Because not to do this pretreatment, the larger particles will plug the reverse osmosis membrane and affect the efficiency of the reverse osmosis system, that is, you say no water.
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Pretreatment is similar to PP, activated carbon and other substances, that is, your filter bag, after the filter bag, the water meets the requirements of the reverse osmosis system water, can be water.