RO water system, RO water Filter, Automatic RO Membrance, Force Pretreatment Backflush, 98% Desalting Rate. RO water filter, RO water system, RO water purifierKey Specifications/Special Features for EW-RO-450L/H RO water filterRating Output: ... RO membrance flushing 2 minutes each hourForce pretreatment backflushApplication: factory, hotel, unit, the group places, and more EW-RO-450L/H RO water ...