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4-Stage Reverse Osmosis System

The 4-Stage Reverse Osmosis System

This state-of-the-art under sink RO system was designed with the most modern materials and technologies to produce a truly affordable and reliable water treatment device. All our Reverse Osmosis Drinking Water Systems come standard with a chrome faucet, additional colors and styles are available for an additional price, call for more information.

4-Stage Reverse Osmosis System Components

Sediment Filter

The sediment filter is an initial filter designed to remove sand silt, dirt and other sediment before treatment of the water, and also removes any rust and calcium chloride.

Granular Activated-Carbon Pre-Filter

GAC Pre-Filter specially designed to remove/reduce many volatile organic chemicals (VOC), pesticides and herbicides, as well as chlorine, benzene, trihalomethane (THM) compounds, radon, solvents and hundreds of other man-made chemicals found in tap water.

Reverse Osmosis Membrane

The reverse osmosis membrane is the heart of the system. This is where any additional dissolved solids are filtered out at the molecular level. Salt and other undesirable molecules are removed at this stage. Our membranes come at water treating rates of 18, 24, 36, 50, 75, and 100 gallons per day (GPD).

Carbon Block Post-Filter

The carbon block filter is an extruded filter made from powdered activated carbon combined with a binder, creating a very dense filter of activated carbon. This is responsible for ensuring that the water is completely filtered and has a great taste, odor and no chlorine.

Contaminates Removed

92-99% of all organics including:

  • Trihalomethanes
  • Polychlorinated biphenyls
  • Pesticides
  • Herbicides
  • Benzine
  • Arsenic

For a Complete list of what our 4-Stage RO removes, please Click Here

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Ultima 4-Stage Model

4-Stage Reverse Osmosis System

We offer the most reliable, effective and efficient water treatment products.

100% Financing OAC

100% Satisfaction Guarantee!


Our 4-Stage RO is covered by a 5 year MANUFACTURERS warranty. Warranty does not include filter replacement, membrane or labor charges.





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