... , the filter should be backflushed every week.3.4The RO device.The RO device removes the hydronium, organic substance, colloid, bacteria ... -pressure pump, the middle tank, the pressure vessel, the RO membrane module, the pressure gauge, the flowmeter, the conductivity ... of water is monitored by the liquid crystal display conductivity meter.The RO system needs be cleaned termly, including the stainless ...