Excellent product the RO system that I installed is unbelievably easy to install and the difference that it makes in my water was a little bit unexpected. My home relies on water from my city water departments treatment plant. It almost seems that the treatment that they apply to the city's water is a treatment of degradation. My tap water straight from the tap is +/-218ppm of total dissolved solids (TDS). After this tap water is run through my refrigerator's water filter I have a reading of +/-180ppm yds. Now my drinking water that comes from the spigot after being run through my R/O filtration system is +/-30ppm yds with a pH level +/-8.0. One great investment. I would highly recommend this to anyone.