- The most water is used during backwash which is about 6 to 10 minutes. It depends on your setting. In general it\'s around 200 to 500 litre per regeneration.Baskwash is to remove all dirts trapped in the resin and prepare for brine/rinse process. Keep in mind, it doesn\'t mean it \'s good if less water is used. It may result not enough cleaning during backwash.
