Supply water characteristics - Drinking water, Temp min 4˚C - Max 25˚ C. Crystal clear water. Max hardness 90˚F. Weight 7.5 kgs. Supply water pressure - min 1 bar, max 8 bar. Maximum flow rate recommended 1000 L/h. Room temperature 4˚C - Max 25˚ C. Salt content per regeneration 1 kg.