Reverse Osmosis Filters

Reverse osmosis (RO) is a filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective," this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.

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APEC Water Systems Extends Reverse Osmosis Water Filter Donation Program for 2011 to Benefit Charity

APEC Water Systems is excited to announce that they will continue providing FREE water filtration systems to people who are in need of pure drinking water for the first half of 2011. From now until the end of June, disadvantaged individuals and families who are experiencing both financial and medical hardships can apply at the website Freedrinkingwater.com for a chance to receive a free reverse osmosis water purification system. According to recent news reports, tap water from 31 of 35 U.S. cities have tested positive for hexavalent chromium,...

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Guide to Water Purification (water filter)

by Rick Curtis first edition published by Random House March, 1998 Water Purification Dipping your head into a cold mountain stream and taking a long refreshing drink is an experience that has basically vanished from the wilderness areas of America. With the increased use of the wilderness there has also been an increase in the amount of bacteriological contamination of backcountry water supplies. The U.S. Environmental Protection Agency reports that 90 percent of the world’s water is contaminated in some way. There are a variety of microscopic...