Reverse osmosis (RO) is the most economical methods to remove more than 93% of total dissolved solids from feed water. This HPL-RO system features a four-stage filtration process which reduces dissolved salts and organics from the water. The four-stage filtration process includes a 5-micron sediment filter, granular activated carbon (GAC) media carbon filter, 1-micron sediment filter, and a thin film polyamide membrane.

This RO system has a system output of 15.8 L/he (75 gallons/day) and includes a 14-gallon (53-L) bladder tank to conveniently store the water.