... 1~0.3 MpaPermitted environmental temperature :5~40 °CUsage:Flushing Filters :When using pure water machine for the first time , ... to 6 monthsSecond stage filter :4-9 monthsThird stage filter(RO Membrane ) :5-10 monthsFourth stage filter : 12-24 ... confirm booster pump have started );open bypass washing valve ;make RO membrane flush ,concentrate water is discharged .After flushing finished ...