What is the normal reading of RO pressure for brackish water?

The normal reading of reverse osmosis (RO) pressure for brackish water is typically around 500 psi. This level of pressure is necessary to overcome the osmotic pressure of the brackish water, allowing for effective filtration and separation of contaminants. Brackish water generally has a higher salinity than freshwater, requiring more force to drive the water through the RO membranes.

Higher pressure levels, such as those reflected in the answer, enable the system to maintain the balance needed for optimal performance, ensuring that more purified water is produced while minimizing energy waste. Operating the system within this pressure range enhances efficiency and prolongs the life of the RO membranes.

The other options represent pressure levels that do not align with the operational requirements for brackish water processing, as they are either too low or too high for effective RO function.