What is reverse osmosis (R/O)? The short answer is it’s a treatment process where water is forced through a semi-permeable membrane that has very small holes or "pores." Let’s flush it out a bit more.

The best water purifier for home use is the DURO Reverse Osmosis purifier. It produces up to 75 gallons of great-tasting drinking water per day using dedicated sediment and carbon pre-filters.