Reject Water from Reverse Osmosis Unit plus with Cooling Water Blowdown feeds to System for Recycling to Pre Demineralized Water( low electric conductivity). About 130 cubic meters of mixing effluent water feed to the Recycling System which comprises of two units of Reverse Osmosis system. Integration of Ultra filtration unit for decreasing of turbidity. System was installed in the Petrochemical Plant and run at 22 hours a day in 340 days of Plant's operating day. A recovery rate of the System is around 40% because it had to produce a very low electric conductivity product water when comparing which a very high electricity water of Feed Water.