A reverse osmosis system includes a membrane chamber having a feed line. The chamber generates a permeate stream and a brine stream from the feed line. A feed pump pressurizes the feed line. A first flow meter generates a first flow signal corresponding to a flow of fluid in the permeate stream. A booster device has a turbine in fluid communication with the brine stream and a pump in fluid communication with the feed line. A motor is coupled to the turbine device and a variable frequency drive is attached to the turbine device operating in response to the first flow signal. A second flow meter generates a second flow signal corresponding to a flow of fluid in the brine stream and a variable size nozzle operates an opening in response to the second flow meter.