Undersink Reverse Osmosis Systems. Biopure under sink reverse osmosis water purifiers are Australian assembled and watermark certified and are ideal for the home and office. Reverse osmosis systems are the best of all the water purifiers at removing contaminants from your drinking water whilst providing you with pure, clean great tasting water. Remove up to 99.9% of toxins including fluoride, heavy metals, chlorine, bacteria and more. Our under sink reverse osmosis systems are assembled from USA and UK made components and water filter cartridges.
Osmosis is a process which occurs when two solutions of different concentrations are separated by a semi-permeable membrane. Reverse osmosis water purification works by forcing the water under pressure against an ultrafine semi-permeable membrane designed to allow single water molecules to permeate through, while at the same time rejecting most contaminants known as waste water. The membrane acts as a mechanical filter, straining out particulate matter, micro-organisms, asbestos, even single molecules of heavier organic compounds.
A typical reverse osmosis consists of four filters in series plus a storage tank. The first is a sediment filter, the second a carbon block, the third a membrane and the fourth an activated carbon block to remove any remaining chlorine by-products. Such a system removes a wide spectrum of impurities from water; the only energy required is that of mains-water pressure.
Reverse osmosis effectively removes turbidity, sediment, colloidal matter, bacteria, chemicals, fluoride, chlorine, chloramines, totally dissolved solids, toxic metals, radioactive elements, pesticides, and herbicides. This can have significant health benefits.
A typical system produces water at a slow rate – almost drop by drop – so most under sink systems have a pressurised storage tank and a separate dedicated faucet or all in one three way mixer tap installed on the sink. Water drawn from the faucet or mixer comes from the storage tank.
The average system produces about 300 litres per day if left to run 24 /7*, more than enough for an average family. (* Depending on inlet water pressure and membrane capacity.)
The average domestic RO will with modern technology achieve a waste water ratio of 1 – 1.
Unlike filters, RO membranes don’t accumulate pollutants but the membranes themselves gradually degrade with use. While the sediment and carbon filters will probably need replacement every 12 months, membranes should be changed every 4 – 5 years or as specified by the manufacturers or dependent on water conditions.