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A reverse osmosis filtration device, or RO water system, can be a useful filtering device in the home. Other applications for reverse osmosis include aquariums, tap water purification, the production of hydrogen, dialysis and many different applications in the food industry. Let’s take a look at the various stages in the reverse osmosis water purification process to get an idea if it’s the right kind of filtration unit for your home.

A sediment pre-filter is used to extract larger contaminants like dirt, sand, dust, grit and rust particles from the water when present. An optional secondary carbon pre-filter is used to extract most of the organic chemicals and chlorine; providing enhanced taste and reduction of odor while helping to protect the reverse osmosis membrane, which can be vulnerable to chlorine.

A RO membrane is normally made from a thin film composite. An optional carbon post-filter is used to capture any chemicals that are still present. This step also helps guard against any tainting which might occur within the device’s water storage tank. Another option, an ultraviolet light (UV-C), is incorporated into the process to disinfect the water of any organisms that may have escaped the reverse osmosis membrane.

A RO water system can be bulky, which means it will take up a lot of cabinet space under or near the sink. Here are a few other shortcomings of reverse osmosis water filtering systems. Unlike faucet, countertop or carafe filters, reverse osmosis filters require plumbing modifications and need to be installed by a professional. If you don’t mind modifying your plumbing and giving up some cabinet space, then a RO filtering system may be the perfect choice for you.

A reverse osmosis water treatment system must occasionally be sanitized with chlorine, a chemical that is highly undesirable and which in many cases is filtered out by other systems. Though chlorine is nearly universally used by city and municipal water systems, it has been shown to cause cancer. Using it to clean the filter that you will use to filter out such things seems to be counter intuitive.

A RO water system may not be appropriate for everyone, since by its very nature it is a wasteful process; it flushes away three to four gallons of water for every one gallon of clean water that passes through. If your water has a poor taste or smell to it, then you could consider a carbon-based, multi-stage filtering system that incorporates reverse osmosis into the process. Whether you choose a reverse osmosis system or a system that incorporates several types of filters into one unit, do your research before you buy; water filtering systems can be very expensive.

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Reverse osmosis or RO water filters seem to be a dying breed. Before you buy one, educate yourself on the facts, since there may be better options available. There are a number of things that a reverse osmosis water filter will not remove when used in the home, such as chlorine, chemicals, the byproducts of chlorination and other things that are lighter or smaller than water’s molecular structure. Let’s take a look at whether RO filters are worthwhile.

RO water filters are very efficient at eliminating toxic materials like lead, rust, salt, parasites, salt, sulfates and sediments, but unfortunately, there are some negatives that go along with a RO system. RO systems only partial remove viruses and bacteria, and require other types of water purification systems to back it up. The RO filtration system actually removes too many minerals that the body needs for good functioning, longevity and health; minerals like potassium, calcium and magnesium for example. If those are eliminated, then it forces the body to draw from stores in the teeth and bones.

Sometimes home reverse osmosis water filtration systems are accompanied by an added carbon filtration device. Carbon effectively removes most of the chemicals that reverse osmosis cannot. But again, still other filters are necessary to remove all of the unwanted particles. For example, chlorine byproducts can only be removed through adsorption since the chemicals are gaseous. They actually just pass right through a reverse osmosis water dispenser.

Another downside is that reverse osmosis filtration systems take up a large amount of space, as the larger units seem to be the most effective. They use electricity and require extensive maintenance. The membranes can become contaminated with algae and bacteria. In order to kill the bacteria and algae, chlorine is used, but it can damage the membrane, and replacement membranes are expensive. Hiring someone to install the system is expensive, as well as the power and water it uses. There is just no advantage to installing a reverse osmosis water system with today’s technological betterments.

After considering all the cons of RO water filters, it seems apparent that a multi-stage filter that employs vital and essential purification processes like ion exchange, carbon and sub-micron filtration are more beneficial in removing all traces of contaminants such as volatile organic chemicals like herbicides and pesticides, lead, chlorine and other harmful materials than a simple reverse osmosis filter. A multi-stage filter also ensures that valuable minerals that are critical to body processes and contribute to better health aren’t filtered out as well.

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