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Nelsen 4-Stage Reverse Osmosis System, 50 Gallons per day (NRO4-50)

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Quick Overview

Quick Overview

  • 4- Stage Filtration

  • Measurements RO system: 17w x 7d x 17h 

  • Measurements Storage tank : 11w x 11d x 14h

  • Endless Pure Water


Nelsen 4 Stage Reverse Osmosis System 


Tested and Certified

  • Double o-ring housings and a clear pre-filter housing for quick inspection of the sediment filter
  • 3.2 gallon NSF approved storage tank
  • 1/4" quick connect fittings, 1/4" tubing
  • Chrome long-reach, lead-free faucet.
  • Filter wrench.

Complete system ready for easy installation 

No Reason To Drink Bottled Or Tap Water Again!! 

List of Contaminants* removed by Nelsen 4-stage

  Ions and Metals    

  Arsenic, Antimony, Aluminum, Barium, Berylium, Cadmium, Calcium, Chlorine,
  Chromium, Copper, Fluoride, Iron, Lead, Magnesium, Maganese, Mercury, Nitrate,
  Potassium, Radium, Selinium, Silver, Sodium, Sulfate, Thalium, Zinc 

  Particles   Asbestos, Protozoan cysts, Crytosporidium
  Pesticides   Endrin, Heptachlor, Lindane, Pentachlorophenol
  Radionuclides   Radium, Uranium

*This table is not an exhaustive list of contaminants that RO may remove, but rather lists those contaminants for which RO can be a practical treatment method for treating household drinking water.

After 4 stages of filtration, enjoy drinking healthy, great tasting water!

How effective is reverse osmosis for improving water quality?

RO is very effective in reducing a range of home water contaminants. This is possible because the reverse osmosis membrane is comprised of microscopic pores which allow the pressurized water molecules, among the smallest molecules known to man, to pass through contaminants, and even dissolved ions are left behind.

Additionally, RO systems always include a sediment pre-filter that traps fine suspended materials that permanently clog the membrane. Most RO systems also include a carbon pre-filter to remove chlorine, along with other contaminants that may damage RO membranes and affect taste, color, and odor of the water.

How does reverse osmosis work

Who should consider purchasing a reverse osmosis system?

Anyone concerned about the quality of their home drinking water -- particularly if they notice taste or odor problems or are aware of high levels of dissolves minerals in their water supply -- should consider an RO system. Additionally, RO systems often are recommended for immune-comprised individuals who could be especially susceptible to infection from various waterborne contaminants. 

The Centers for Disease Control and Prevention (CDC) recommends reverse osmosis as a method for removal of a dangerous microorganism cyst called Cryptosporidium. Reverse osmosis systems, which generally include both and RO membrane and pre- and post-filters, offer a comprehensive means of eliminating more than 90 percent of potentially harmful contaminants in home drinking water.

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