What specific PSI increase is required for every 100 PPM TDS in water?

The correct answer indicates that for every 100 PPM (parts per million) of total dissolved solids (TDS) in water, an increase of 1 PSI (pound per square inch) is typically required. This relationship illustrates how the concentration of dissolved solids in water affects the pressure requirements in water treatment systems, specifically in reverse osmosis (RO) systems.

As the TDS level increases, the osmotic pressure in the water also rises, which in turn necessitates higher operational pressure to facilitate the same level of filtration effectiveness. This fundamental principle is crucial in understanding how the efficiency and performance of RO systems respond to varying levels of TDS.

Understanding this relationship helps technicians configure and optimize RO systems to ensure they work efficiently across different water qualities. It also assists in predicting system behavior in response to changes in feed water conditions, leading to more effective service and maintenance of water treatment equipment.