... 50Hz RO membranes:4040 1 items(1 grade)Multi-stage pump: CDL2-90/1.1 KW 1 itemBeforehand filter:D250×1350 ... 2 itemsPP sediment membranes filter tube:D195×500 1 itemsBooster pump:BLC70/0.37 KW 1 itemQuartz sand filter:90 KgActive ... level auto stop,low water level auto start,;Multi-stage pump protected without water,;protected when no power ,poor power,large ...