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The Reverse Osmosis Process

Recommended Treatment Methods

The way that Reverse Osmosis (RO) works is that your household water pressure forces the water molecules through the RO membrane. All the dissolved solids that are too big to pass through the pores of the membrane are rinsed away to the drain.

The RO membrane (center position) is the workhorse of the system, and performs most of the water purification. The RO membrane in the Microline system is a thin film composite (TFC) type. TFC is one of the highest quality RO membranes, but the material of composition can be damaged by chlorine present in municipal water. So in this unit the leading filter is a composite composed of spun poly-fiber to remove sediment and protect the RO membrane, and activated carbon to remove chlorine. In the economy unit, the RO membrane is composed of Cellulose Triacetate (CTA) a less expensive membrane. CTA is not damaged by chlorine, but its organic nature is vulnerable to bacterial attack, and is used only in applications that have chlorine present in the feed water. In the economy unit the lead filter cartridge is a spun poly-fiber sediment filter which also protects the CTA RO membrane. Our post filter is a "polish" filter that is composed of high grade activated carbon, and removes most residual impurities from the water. You may also notice that some models include an additional in-line post carbon filter which functions to further improve the water's taste and quality. Other units include a conductivity meter which will advise you when filter replacement is required.

Generally the pre-filter, post-filter and in-line filter needs replacing every year, and RO membranes are replaced every three years with normal water consumption. What ever RO system you decide to purchase, it's always a good idea to make sure that the unit it is NSF approved to ensure that you are getting a good quality drinking water. You can see some of our available units on our Reverse Osmosis page.

Residential Reverse Osmosis Drinking Water Systems

Standard filters and water softeners can remove large amounts of contaminants from water; however, some contaminants are present in a form so small that regular filters and softeners cannot remove them. These contaminants can be removed by a process called Reverse Osmosis or RO. Our small, high efficiency Reverse Osmosis units are easily and economically installed at the home sink. Your drinking water will taste sparkling fresh, and the need to purchase expensive bottled drinking water is eliminated. Deposits won't form on steam irons and humidifiers. Plants, pets, and aquarium fish thrive on RO water! You can feel confident knowing that your Reverse Osmosis system is reducing contaminants that are harmful to you and your family's health.

Undersink Reverse Osmosis System Comparison


CONTAMINANT

AVG. % REJECTION

Microline
25S/D/DM

GE Merlin

TGI 
415 & 525

BARIUM

99.5

98.3

99

CADMIUM

99.3

99.8

99

CHROMIUM (HEX)

99.5

97.9

99

CHROMIUM (TRI)

99.5

99.8

99

COPPER

99.4

97.8

99

FLUORIDE

97.5

93.7

98

LEAD

99.5

99.6

99

MERCURY

97.0

NA

98

NITRATE

84.1

78.4

97

RADIUM

80.0

NA

80

SELENIUM

96.9

97.8

99

GIARDIA AND CRYPTOSPORIDIUM

99.9

99.9

99.9

Microline, TGI and GE Merlin reverse osmosis systems are fully tested to ANSI/NSF Standard 58 Protocol.

         
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