A home-based reverse osmosis, or RO water system, consists of four to five different stages in order to be effective. The main issue of complexity of these devices relates to pre-filters that are in place to prevent the RO membrane from becoming clogged up and degrading over time. Those pre-filters keep the system running smoothly and prolong the life of the unit. The stages of a home-based reverse osmosis filtration system include a sediment pre-filter, an optional secondary carbon pre-filter, the reverse osmosis membrane itself, an optional carbon post-filter and an optional ultraviolet light.

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.

What types of contaminants does a RO water system filter? The contaminants it does filter include mercury, bromide, cadmium, chlorine, calcium, chloride, chromate, copper, cyanide, fluoride, iron, lead, magnesium, manganese and sulphate, to name a few. For all these many reasons, reverse osmosis water filtration systems are rarely your best or only choice for purifying water. There are other highly effective filtering systems without nearly as many drawbacks.

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You may be tempted by the lower priced water filter system that retails for around $50, since that sounds like a reasonable price alternative for a family on a limited budget. But, there are several problems with filters at that low of a price scale. Most are really only chlorine filters and not actual purifiers. Although chlorine removal is fine, that in and of itself is not enough anymore. Water contaminants include hormones, drugs, herbicides, pesticides, benzene and gasoline additives because they are present in groundwater and come through the tap, straight into your sink.

Among water filters, reverse osmosis is the most expensive choice for home use. RO filters are used in large industrial applications as well as in public facilities. In certain home applications, reverse osmosis filters are the right choice, but for the most part, the price and lack of filtration of certain contaminants means you are better off choosing another filtration method. The best application for RO systems is desalination, which is the process of removing salt from water.

The more reasonably priced, reverse osmosis water filter type of system tops out in price at around $450. They generally include some form of micron filter combined with carbon filtration, RO and some sort of filter to balance pH levels and mineral content. You can get other water filter system devices that are the same quality or better than reverse osmosis for less than $150. The big difference is the mark-up by certain reverse osmosis distributors.

Many harmful contaminants, such as trihalomethanes and volatile organic chemicals, which have also been linked to cancer, are not blocked by the cheaper models. In some cases, lead, which is toxic, is not removed. Lead contamination is a big problem for many cities, not because the city water treatment facility isn’t doing the job, but because the pipes that run into homes are old and contaminated.

Bacterial cysts are another type of contaminant that a cheaper drinking water filters typically cannot remove. They cause parasitic infections in the gastrointestinal tract and have been know to cause serious health problems and even death in the elderly, children and people with compromised immune systems.

Some say that any filtering system is better than none at all, but remember, if you want the best for your family, then you can get the best filtering system at a reasonable price as long as you shop with care. Choose a water filter system that gets rid of the most contaminants that is possible, while keeping maintenance costs to a bare minimum. You can do that if you take a little time to investigate the home water filtration systems available.

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In the natural world, compounds travel from a direction of higher content to one of lower content. This means that if you place a handful of dirt into a gallon of water, it will not simply stay on the bottom; it will gradually contaminate the entire vessel of water. That is exactly the opposite of what the reverse osmosis process does. During RO water filtration, pressurized liquids are forced through a membrane so that minerals and other particles that are heavier than the liquid are removed.

How do reverse osmosis water filter systems work and what does it do to water? It is used to remove large particles of dirt and minerals from water sources. RO can remove sand, minerals and stones as well as salt. For the most part, all groundwater contains some form of contaminants that are unhealthy for humans to ingest. What makes it difficult to grasp is that some of the contaminants cannot be smelled or tasted.

Now that you know what reverse osmosis filters do, let’s look at what these filters do not do. On the flip side, reverse osmosis has a laundry list of what it does not do. It does not remove chemicals or disinfect water. Although RO may be one step in a complete process, it should never be the only step if drinking water is to be made safe for human consumption.

Although some companies sell RO water filtration systems for use in the home, they are very expensive and do not provide a satisfactory amount of contaminant filtering. The only homes that truly need RO water filtration are those whose only water option is sea water. So this does supply some demand for reverse osmosis devices, but for most people, they are truly unnecessary.

What the RO water filter systems do not do is remove chlorine. Generally, chlorine removal is pretty much the biggest reason why most of us need water filtration in the first place. This is because RO filters cannot block anything that is lighter than water. This includes a lot of pesticides and herbicides; they are lighter than water and therefore are left behind by reverse osmosis filtration.

Another problem with reverse osmosis filtration is waster water. In this day and age of water being in short supply, reverse osmosis filtering wastes from three to five gallons of water for every one gallon of water that is cleaned. That is a dismal and inefficient record for sure.

As people have slowly begun to learn the truth, reverse osmosis devices are losing their appeal. Manufacturers still try to take advantage of the need for cleaner water by touting the RO water filtration as the most technologically advanced filtration system, but don’t buy into the hype. There are many other water purifiers on the market today that are better.

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If you are one of the many consumers who is not using a water filter, then you really should consider purchasing a multi-stage filtering system; here’s why. If you walk down the beverage aisle in any grocery store in the United States, then you will notice that the most popular item on the shelves is water. Why is that, you may ask? One reason is that it sells like crazy, and another reason is that tap water in a lot of homes tastes bad and is unpleasant to drink. Yet there should be another reason, and that is your health.

There are several faucet filters that have been approved for both commercial and home use. There are under-sink devices, refrigerator filters, countertop filters and shower filters, among other types. Whichever type of water filter you choose, most reputable companies offer reliable and efficient products. Each works in various ways, as some use ultraviolet light, reverse osmosis and submicron filtering and all are very helpful to consumers looking to get safe and clean water at home.

Companies that are murky on the specifics of their product should be avoided. If you call them regarding the details, you may learn that what they are offering is not a water purifier at all, but merely a filtering system that blocks some chlorine and eliminates odor. The company’s data sheets should include information about how effectively each contaminant will be addressed and removed. There are drinking water filtering systems that will remove all of them, but you have to be a smart shopper to find them.

Another great way to tell if the filter you are considering is effective is if it is not sold in specific states. There is always a good reason why this is so. In states such as Wisconsin, California and Massachusetts, companies are required by law to have their products certified by independent laboratories. During the certification process, claims must be verified before the product can be sold. It is then obvious that companies who provide inferior systems will avoid the states with regulations.

For those companies that have excellent water quality performance records, California also provides a department of health certification. To receive this certificate, extensive testing is required. If you see that a company has the certification, you can rest assured that you have found a quality, home water filter product that will work as it should.

Typically, a water filter system that costs less initially will end up costing more to use in the long run. Cartridges and filters generally have a short lifespan, which requires frequent replacements. Of course, there really is no such thing as a maintenance-free unit. There are a few disposable filters, but they cost even more and are mostly ineffective. For a kitchen countertop unit, a reasonable price to pay is around $125. You may have to pay more if you buy from a dealer or department store because of mark-up, since everyone wants to make a profit.

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