... control system;automatic control warranty:1 year Brief instruction of the 50000LPH One grade ro water treatment/purification system1. Introduction ... the filter should be backflushed every week.3.4The RO device.The RO device removes the hydronium, organic substance, colloid, ... pressure pump, the middle tank, the pressure vessel, the RO membrane module, the pressure gauge, the flowmeter, the conductivity ...