Get the drinking water you've been longing for with the Pentair 4-Stage High Efficiency Monitored Reverse Osmosis System. This system is NSF Standard 53 and 58 certified and offers a massive reduction in countless drinking water contaminants including TDS, Chlorine, Heavy Metals including Lead, Pharmaceuticals, and Pesticides. Along with its high efficiency due to its 1:1 product vs waste ratio, the GRO-475M includes
an effortless click-in lock and color coded cartridge for easy installation/maintenance, as well as a TDS monitor. The TDS monitor is used to monitor your system performance and let's you know when you may need to change your filters.