All About Under Sink Water Filters
What They Are,
How They Work, And How Much They Cost
Under sink water filters
are just what you think they are – water filters and/or purifiers that mount
under your sink. They work by filtering your tap water before it actually comes
out of the tap, capturing impurities and particulates in a filter that can be
easily replaced when needed.
How Under Sink Filters Work
The two most common types of systems using replaceable
water filter cartridges for installation under the sink are activated carbon
and reverse osmosis. They each work a bit differently and typically filter out
slightly different combinations of impurities and contaminants. Let’s take a
look at each one.
- Activated Carbon – This type of under sink water
filtration system uses a replaceable cartridge filled with activated carbon to
remove impurities. Depending on the size of the filter and how densely packed
the carbon is inside, most activated carbon systems will capture chemicals,
pesticides, chlorine, radon, and most particulates. The filters need to be
replaced every six months or so, and replacement cartridges are generally easy
to find and install yourself.
- Reverse Osmosis – This type of under sink filtering
system is a bit more complex than a simple carbon system, although it does
generally include a pre-filter that is often carbon based. Water passes
through the replaceable pre-filter to remove larger particulates. It is then
passed at pressure through a fine membrane. Water that makes it through the
membrane is stored in a small pressure tank until used, while the rest of the
impurities and particulates are discharged as wastewater.
Compare Under Sink Water Filters Here
How Much Do They Cost?
The cost of under sink systems and replacement filters, both activated carbon
and reverse osmosis, varies widely. Most carbon-based systems can be found for
$50 or less, while reverse osmosis systems can cost as much as $100 to $200.
Keep in mind that the actual cost of any under sink water filtration system is a
combination of:
- The purchase price
- Installation cost (if any)
- Ongoing maintenance costs
- The cost of replacement filters
All of these factors need to be considered when you are
determining which type of water filters for under sink point-of-use may be the
best choices for your needs.
Another Important Consideration
Before you get too far down the road toward buying or replacing an existing
water filtering system, there is another important consideration that must be
taken into account. Different types of filter systems have different
capabilities in terms of the impurities and contaminants they can filter out, so
you need to know the composition of your water before making a final decision on
an under sink system. You can do this through a simple water test, either
performed by your local purification system retailer or by purchasing a
do-it-yourself test kit.
It is not unusual for water to contain a variety of contaminants such that no
single type of under sink filter can eliminate them all. In this situation, you
can combine two different types of systems to ensure that all contaminants are
trapped, or replace an existing inefficient system with one that will trap the
largest percentage of your specific water contaminants. If you are not sure
which approach is best for you, consult with a water purification system
retailer
for expertise and guidance.
Differences in Under
Sink Water Filters
Just as not all filters for the home are appropriate for
everyone, there are a variety of under sink water filters. The best way to
select a particular product..
Types of Undersink Water Filters
Undersink water filters can be used by themselves or in conjunction with a whole
house filter. Millions of people become ill every year due to bacteria and
pollution..
Purchasing and Installing Under
Counter Water Filters
Under counter water filters are the least expensive of all filtration systems.
They are also the easiest systems to install. While the installation process can
vary slightly...
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