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Reverse Osmosis

Reverse Osmosis

For information on our range of Countertop, Portable and Undersink Models .. Click Here.

Reverse osmosis (RO) is the premium filtration and an excellent way to remove certain unwanted contaminants including Fluoride, Mercury, in fact all minerals, heavy metals, all chemicals and bacteria from your drinking water. Normal household water pressure forces water through the membrane.

The membrane rejects most of the dissolved substances in the water and allows only purified water to pass through. Purified water then enters a storage container and the rejected water goes down the drain as waste.

Reverse Osmosis consists of several different stages to remove sediment, chemicals including Chlorine and other contaminants, the reverse osmosis membrane, a storage container for the pure water and an post carbon post filter.

 Unfortunately some sellers will expand this basic filtration and offer 5 – 6 and even 7 stage systems, including 2 carbon filters, which is simply not required and only increases your yearly cartridge change.  

We recommend a 4 stage unit, incorporating a sediment pre filter, carbon pre filter, membrane and a post filter. Any additional stages should be for the addition of minerals and alkalinity to the pure water to ensure energised and remineralised water. For more information on this go to

 Unfortunately Reverse Osmosis cannot be used to treat all the water entering your home for the following reasons.

  1. Waste to pure water ratio. To eliminate filtered contaminants a waste water is produced in the filtration process. All Puregold Reverse osmosis use 300 litres/day membranes, with a waste component of 1 litre of pure water to 1.5 litres of waste water.

  2. Slow Production. Puregold incorporate USA made Dow Filmtec Membranes in all portable and undersink units. At 300 litres a day, 10 – 12 litres a day or 1 litre every 4 minutes, a storage containers is required. All undersink reverse osmosis come complete with a stainless steel storage tank, portable units require either a container, either glass bottles or a larger container.      
  

Substance

  
  

% Rejection

  
  

Substance

  
  

% Rejection

  

Aluminium

96 - 98

Fluoride

96 - 98

Sodium

92 - 98

Bromide

90 - 95

Magnesium

93-98

Cyanide

93-97

Potassium

92-96

Sulfate

96-99

Calcium

93-99

Thiosulfate

96-98

Manganese

96-98

Silicate

92-95

Iron

96-98

Silica

95-98

Copper

96-99

Nitrate

93-98

Nickel

96-99

Polyphosphate

96-98

Cadmium

93-97

Orthophosphate

96-98

Silver

93-96

Chromate

90-95

Zinc

97-99

Bacteria

>99

Mercury

94-97

Lead

96-98

Hardness

93-97

Arsenic

90-98

Radioactivity

93-97

Medications

97-99

Chloride

92-98

Chlorofoam

71-90

Ammonium

85-90

Tin (11) Sulfate

83-87

PCB's

97-99

PBA's

96-98

 

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