How Long Does it Take to Clean an RO System

A typical two-stage RO skids can take 8-12 hours to clean, depending on the time it takes to heat up the cleaning chemical solutions. If an extended soak time is required, it can take even longer, up to 24 hours, including the soak period (see Chapter 13.2.2). Each stage in a skid should be cleaned independently of the other(s) so as not to contaminate one stage with foulants or scale from another, which is why it may take a day or so to clear an entire system. 

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