The key component for any reverse osmosis unit is its membrane. The membrane will determine the type of contaminants removed and how much water the unit will produce. TFC (Thin Film Composite) membranes will remove 95% of nitrates, up to 95% of silicates and is excellent for TDS (Total Dissolved Solids) removal. Hi-F (High Flow) membranes have the same characteristics as the TFC membrane but provide higher GPD (Gallon Per Day) water production. Hi-S (High Silicate) membranes are the gold standard and will remove 96% of nitrates and up to up to 99.5% of silicate. Chlorine will ruin TFC, Hi-F, and Hi-S membranes so prior carbon filtration is required.

Please note that these replacement cartridges are interchangeable with Kent Marine`s, and SpectraPure`s RO or RO/DI units. We have researched for the best replacement cartridges among these three manufacturers and offer only the best cartridges.