The new “ GRO ” membrane by Pentair. The only true 1:1 rao membrane that provides the highest efficiency reverse osmosis drinking water system. High contaminant rejecon, long mem- brane life, and backed by Pentair! All Watewise Soluons RO systems are available with the Impact Alkaline filter or a natu- ral remineralizing filterNo for great tasng R.O. wa- ter! Waterwise Soluons , your source for higher quality water! TrueFLow RO