Is a faucet water filter enough to allow you safe water, or is it wiser to set up a water filtration system for the entire house? Is UV treatment or a smarter option? Finding an exact answer can be difficult. The type of water filter and the filtration method you use depend on a few factors. Some of these include your preferences, your budget, specs, and materials of the pipe, water pressure, biochemical properties of the water, etc. All of those vary from home to home.
In this article, we’ll look at the most popular types of water filters, making the whole process of selecting a water filter easier. Typically people install faucet filters, buy water in bottles or use water pitchers – very popular option that has been trending lately read more about filters for water pitchers here. All of these have their pros and cons and it us up to you to decide with what you should go.
Various Types of Water Filters and How They Work
Based on your application, there are several types of water filters:
– Absorption filters
– Mechanical filters
– Ion exchange filters
– Sequestration filters
– Reverse osmosis filters
All of these address a distinct water problem and most filters utilize a combination of these techniques to carry out multiple levels of filtration.
How Do They Work?
More often than not, carbon carries out the absorption in a water filter, which is very effective at trapping water-borne contaminants. Carbon absorbs these pollutants so readily mainly because it has a huge internal surface that’s full of crannies and hooks that can catch chemical impurities like chlorine.
Many common residential water filters comprise granular activated carbon, which minimizes unpleasant tastes and odors through absorption. Expensive filters have carbon block filter components that are usually more effective and often come with a micron rating. Various substances are applicable in making carbon for filters such as coconut shell and wood; coconut shell filters are more expensive but effective.
Mechanical filtration aims at physically removing dirt, sediment, or any particles available in the water by using a barrier. A basic mesh that captures large debris can be a mechanical filter. A ceramic filer is also a mechanical filter but has a very complex pose design for ultra-fine filtration of various pathogenic organisms. A mechanical filter will often come with a micron rating which shows the effectiveness of the filter based on the size of particles it can remove.
Ion exchange, unlike scale inhibition, physically eliminates the hard minerals, lowering limescale and ensuring the water is suitable for usage where it’s maintained at a constant high temperature. Ion exchange resins are commonly used to carry out ion exchange and are usually in the form of small beads. Since water filters are normally sealed units, you could replace the filter. However, it’s worth noting that you can return Calcium Treatment Units to your supplier to get regenerated.
It’s the process involved in chemically isolating an element. Food grade polyphosphate is popularly used in scale inhibiting filters to isolate the magnesium and calcium minerals which bring about limescale and corrosion. Polyphosphate, however, is generally introduced in really small quantities and it only inhibits the scale instead of removing it. That implies that polyphosphate doesn’t soften the water but rather deals with maintaining the minerals within the solution, keeping them from forming a scale on those surfaces they get into contact with.
It’s the process of eliminating dissolved inorganic substances (such as calcium ions and magnesium ions) from the water by forcing it via a semipermeable membrane that’s under pressure such that it allows water to pass through but leaves behind most of the contaminants. Reverse osmosis is a very effective method of purifying water and is often combined with a few other water filters such as absorption (activated carbon) filter and a mechanical (sediment) filter to return water with some contaminants remaining.
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