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water that comes out of your faucet is perfect. If you don't use a filter your body is the filter. Which of these two sentences are more true? Both are partially true.
In many places,[link widoczny dla zalogowanych], tap water does not taste good. In other places, tap water has tiny amounts of substances you would not want to drink - and over a lifetime might have an affect on you.
There are many kinds of potential contaminations in tap water. Even if your city provides good water, it has to travel a long way through old pipes on the way to your house.
I use a whole-house ten micron sediment filter to filter all water going into my house. I change the filters every five months, and they are filthy and red-colored, because of the rust and dirt in the water. When you use a whole-house filter, shower heads and faucet screens don't clog. Whole-house filters are separate from drinking water filters.
All reverse osmosis water systems require both sediment and carbon pre-filters. All filters need to be changed. Plan on changing sediment and carbon filters every six months or sooner, and reverse osmosis membranes every 2-3 years.
It's best to buy a dissolved solids meter, and test your water every month to make sure the system is working right. Pure water will measure zero parts per million of dissolved solids. Tap water usually measures at least 210 parts per million.
Don't get a liquid chemical test set, get a $25-$50 portable battery-operated tester with a LCD readout. These cheap meters only show the total dissolved solids in water - they can't tell you what is in your water.
Water filter systems and replacement filters are available on Ebay and Amazon, and many other places - even retail stores.
The hardest parts of installing water filters are connecting to the supply side of the water into your house, connecting to a drain line for the waste water, and installing a clean water faucet onto your sink. The rest of a water filter installation is easy.
You may need a plumber, or to buy a system where they will install it for you. The best systems have clear plastic casings,[link widoczny dla zalogowanych], so you can see how dirty the filters get. The best systems also use standard-sized replacement filters, so you don't have to buy tiny, expensive, and proprietary filters.
Reverse osmosis water filters require both a sediment and a carbon filter in front of them, to screen out the dirt and most of the junk, before the water enters the reverse osmosis filter.
A sediment filter blocks particles larger than five or ten microns. That's an improvement over tap water, but it does not help the taste, or filter out tiny or dissolved nasty stuff in the water. The next step is a carbon block filter.
Almost all carbon block filters are activated. Activation is a process where high pressure steam is passed through coal to purify it so that it becomes almost pure carbon. Carbon is the fourth most common element in the universe,[link widoczny dla zalogowanych], and is needed for life. Carbon makes an excellent filter, especially when extruded into a solid block.
Activated carbon block filters strain water to trap much more particles than a sediment filter can. Activated carbon filters have a positive charge to attract chemicals and impurities. As the water passes through the positively-charged carbon, the negatively-charged contaminants are attracted and bound to the carbon.
Activated carbon block filters strain out sediment, dirt, bacteria, algae, chlorine, some pesticides, asbestos, and much more. They filter sub-micron size particles, making quality water that tastes good.
The water passing through activated carbon blocks still has some particles, chlorine,[link widoczny dla zalogowanych], nitrates, fluoride, and other dissolved junk. The next step for the best quality water is a reverse osmosis filter.
Reverse osmosis filters force water through 0.0001 micron-wide holes, through semi-permeable membranes. Long sheets of membranes are sandwiched togeth