An experimental investigation was conducted to study the effect of operating parameters on the permeable conductivity and product rate were studied for reverse osmosis process. The parameters studied were:- conductivity of feed water in the range of (1000-1500 us/cm), pH in the range of (4-10) and operating pressure in the range of (3-6 bar). The best operating conditions, which lead to good quantity and quality for water product, are: (1000 ms/cm) conductivity of feed water, (7) pH, and (6 bar) operating pressure. At these conditions the permeable conductivity is (52.905 us/cm), and the product rate is (328.143 l/hr)