Frequently Asked Questions
Drink Pure Healthy Clean Water
Please cruise around the site, using links and the buttons above - to learn more about additional issues
like chlorine or chloramine, fluoride, drugs, etc.
Friendsofwater.com is family-owned and completely independent. We consider and select water products to sell that do a great job, fulfill the claims made about them, and are a good value. There are many choices for water filters available, and we could set ourselves up to resell many water filter lines.
Click here or below to go straight to water filters in the store
Frequently Asked Questions
Will the filter result in slow water flow?
No, we don’t sell any filters that result in a slow water flow.
How long before I need to replace the filter media?
Typically once for year for kitchen canister units and filtering water bottles.
Every filter has that information in the description in the online store.
How much does replacement media cost?
Every filter in the online store shows the replacement media to the left of the description under “REPLACEMENT FILTERS.”
For more detail, click on the item.
Do your shower and bath filters remove fluoride?
The primary risk of fluoride is from ingestion – unlike chlorine and chloramine, fluoride does not release into the air, is not
breathed in, and is not readily absorbed through the skin.
However, our shower and bath filters reduce fluoride up to 40%. We haven’t found any others that remove more.
If we did, and they were well made, we’d sell them. Because there are some customers who prefer to filter it out of their
shower water too.
Will the filter put aluminum (or BPA or any other contaminant) in my water?
Of course not, we’re here to help people get clean, healthy water. All the filter materials used have been tested to NSF
standards and put nothing harmful in the water. There is no aluminum in any of our filters. Activated alumina is an inert
resin. What we know of as Aluminum is a much more highly processed material. That processing includes the
addition of fluoride. The resin Activated Alumina in many of our filters to remove fluoride is not dangerous.
How do your filters work?
We have many different types of filters for many situations, whole house, point of use, travel, etc. We are not a one-size
fits all business. How each filter works is detailed within the description of each filter. Also see the links within each
description for still more detail.
In every case however, it is what we call "classic" filtration: where the water if filtered by running over and through the right
If you have well water, please get your water tested and email us with a copy of your report. You don’t want to spend
money on a filter that targets contaminants you don’t have – and may not target contaminants you do. And we need to
know levels to be able to prescribe appropriate amounts of the right filter materials.
Many of your filters use kdf, which is made of copper and zinc. Aren’t copper and zinc dangerous?
Anything can be dangerous if you get too much of it. Copper and zinc however, are both trace elements that the human
body needs. Many Americans are deficient in zinc. Our filters leave copper and zinc in the water at a small fraction of the
level people need each day; but at least it's some.
Copper ions are water-soluble and function in low concentrations serve as a bacteriostatic substance and a fungicide. It is
an essential trace nutrient to all higher plant and animal life.
Zinc is an essential mineral of exceptional biologic and public health importance. Zinc deficiency affects about two billion
people in the developing work and is associated with many diseases. In children, zinc deficiency causes growth retardation,
infection susceptibility and diarrhea, contributing to the death of about 800,000 children worldwide every year!
In our filters, copper and zinc work together in several ways, including that the zinc moderates the amount of copper left in
the water, and the copper moderates the amount of zinc. Kdf also improves the effectiveness and efficiency of carbon.
Are your filters as good as Reverse Osmosis? Or the variant: Are your filters reverse osmosis?
No friends. We of course could sell reverse osmosis filters. But we only the sell the best. Reverse osmosis is not the best
type of filter for many reasons, and we won't sell products we don't believe in. We recommend against reverse osmosis.
You can read more here: Reverse Osmosis.
How do I know if there is chlorine or chloramine in my water, and if there is fluoride?
Call the phone number on your water bill and ask them. Or do a web search for "'Your town & state' Annual Water Quality
Report" and see what they list. If it lists it, it's in your water. If it doesn't, it's not.
What if we have both chlorine and chloramine in our water?
That is only likely to happen if your municipality gets water from different sources in different seasons, and one uses
chloramine and the other doesn’t.
Chloramine filters will do a better job with Chlorine than Chlorine filters will do on Chloramine. So for shower and bath, get
For the kitchen, the 3-canister FLUORIDE, Chloramine Plus filter has materials that will effectively remove both chlorine and chloramine.
We thought that block carbon was better. Why do you use granulated carbon?
Block carbon is not a better filter. Granulated carbon provides acres of surface material. Water filtration happens by contact time
between water and filter material. Guess which has more contact time - a block - or granulated material with acres of surface area?
If granulated carbon is not combined with kdf, as is the case in our kitchen canister and whole house filters, granulated carbon
has problems. Water can channel through the same path in the carbon, reducing effectiveness. And when that happens, pockets form
where bacteria can breed.
Both of these issues are eliminated when carbon is combined with kdf. The water comes out of the kdf in all different ways, eliminating
channeling and pockets. And copper (one of the materials in kdf) is a bacteriacide. Kdf is bacteriostatic, meaning bacteria cannot breed
in the water or the filter materials.
Thus, in our kitchen and whole house filters, you gain the advantages of granulated carbon and totally eliminate the potential
disadvantages. The result is more effective filtration and longer-lasting filter material.
Do your filters adjust pH?
No, if you are on a municipal system, your water is already pH neutral, so using filter material space to neutralize pH is a was of
filter space. You want filter media that actually does what you need done.
These are filters - filtering out contaminants. They are not ionizers. And by the way, ionizers may contain some filter material, but their
primary role is not filtration. Those who chose to use ionizers often put our filters in line before the ionizer so that contaminants
What is the micron size of your filters?
One or two sediment filters is built into each kitchen cartridge. The standard micron size is 5 microns. This is the least important
method of filtration in these filters.
What about TDS (Total Dissolved Solids)?
We understand that there are some companies that make a big deal about filtering TDS. However, TDS is not a great measure
of contamination. Our concern is contaminants filtered, not TDS - which provides only hints about what is actually in your water.
"Total Dissolved Solids (often abbreviated TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid in: molecular, ionized or micro-granular (colloidal sol) suspended form. Total dissolved solids are normally discussed only for freshwater systems, as salinity comprises some of the ions constituting the definition of TDS. The principal application of TDS is in the study of water quality for streams, rivers and lakes, although TDS is not generally considered a primary pollutant (e.g. it is not deemed to be associated with health effects) it is used as an indication of aesthetic characteristics of drinking water and as an aggregate indicator of the presence of a broad array of chemical contaminants.
If there were nothing else to go by, TDS provideS some indicators. It seems clear to us that it is far better to
get filters that actually target the chemical, organic and metallic contaminants that are in your drinking water - and leave
the trace elements that the body needs.
Click to go to a representative list of what is filtered What is Filtered?
example of a 2-canister undercounter filter
example of a 3-canister countertop filter