... & maintain 5.Low price 300 L/H RO water treatment equipment (2 grades)Suitable for residential, hotels, schools, mines, factories, especially ... membranes manual wash with medicine;3) pure water high water level auto stop, low water level auto start;4) Multi-stage ... according to customers' instructions, we offer OEM services.Picture for reference:Flow charts:Pure water production line: 300L/H drinking ...