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One of the commonest questions we are asked by someone considering a water filter is “How often do the filters need changing?”
Timely filter changes are important in keeping your unit working effectively and recommended change periods are given for all water filters supplied. Such recommendations however are to some extent a ‘rule of thumb’ as the filters actual working life will be determined by variables such as the quality of the incoming supply including such considerations as hardness and the amount of water passed through them during the recommended period. Ideally the installation of a simple water metering device at the time of filter installation will allow a more accurate determination of filter change timing than the length of time that they have been in use would do alone.
The filters cartridges on most undercounter water filter systems would normally require changing between 6 - 12 months and whilst filter change is not at all the onerous task it is sometimes thought to be there are circumstances where the use of a long life water filter may be beneficial for the owner; perhaps they may be unable to change the filter themselves or have a very busy lifestyle for example.
Fortunately there exist some water filters which only require changing once every two or even three years and are ‘set & forget’ for their lifespan after which they may either be discarded and replaced in their entirety or have a replacement cartridge fitted, depending on the model.
This type of long-life filter includes bacteriostatic media to ensure no bacteria build up during the long-life of the purifier and most types will contain a combination of filtration media types the commonest being granular activated carbon (GAC) sometimes silverised to prevent bacteria, and KDF (Kinetic Degradation Fluxion).
KDF is able to significantly extend the life of granular activated carbon component of a filter having a unique combination of copper and zinc creates an electro-chemical reaction. During this reaction, electrons are transferred between molecules, and new elements are created. Some ingredients are changed into harmless components. Free chlorine, for instance, is changed into benign, water-soluble chloride, which is then carried harmlessly through the water supply.
Similarly, some heavy metals such as copper, lead, mercury and others, react to plate out onto the medium’s surface, thus being effectively removed from the water supply.
KDF will remove Chlorine, Lead, Arsenic, Barium, Cadmium, Chromium, Selenium, Mercury, Iron and other metals that may be present in the water.
The Granular Activated Carbon, often originating from Coconut Shell, is used to improve the taste and odour and to remove: Chlorine, THMs, PCBs and many other organic contaminants that may be present in the water.
The coconut shell granular activated carbon component may also include Riolyte which re-introduces beneficial minerals sometimes lost during the filtration process.
These filters will give some small reduction in limescale but are not designed for this purpose and if you are experiencing limescale problems we would recommend other units which are more effective Please see our Blog article ‘Limescale Treatment - What are the Options?
This type of filter will not remove fluoride and again, more suitable filtration options are available for this purpose in our ‘Fluoride Removal’ category.
So far we have just discussed undercounter kitchen water filters suitable for drinking water however there are also a number of whole house water filters which have extended filter lifetimes as single housing installations or some dual or triple housing systems may include a long-life cartridge as a component with other cartridge types.
The principal media type employed in the long-life whole house systems is known as ‘active ceramics’ which consist of four types of ceramic beads which each do a slightly different job resulting in a very wide range of contaminant removal and which also have the advantage of adding beneficial minerals into the water supply.
Very few filters are so effective in reduction of Hormones and Fluoride.
Active ceramics are one of the most effective filtration systems at killing bacteria, and ensuring a bacteriostatic environment within the filter (NO bacteria, algae or fungi can grow within the filter).
An advanced and innovative 6-stage filtration process which reduces chlorine, heavy metals, bacteria, toxins and a vast array of other undesirable ingredients in your tap water.
The Pure Life 6 Stage filter combines the very best of filtration methods into one neat cartridge and uses silver impregnated granular activated carbon, then further granular activated carbon (GAC) mixed with patented riolyte which returns beneficial minerals to the filtered water. Includes Active Ceramics which gently introduces minerals into the water making it more palatable and better for you and well as increasing the pH of the water making it more alkaline.
Supplied with filter tap, tubing, connectors & housing spanner.
Cartridge life: 18,925 litres or up to 2 years
Cost over lifetime: £1.35/wk
Employs a patented bacteriostatic media, KDF®, which has been tested and certified to drastically reduce or effectively remove: Chlorine, Lead, Arsenic, Barium, Cadmium, Chromium, Selenium, Mercury, Iron and other metals that may be present in the water.
Coconut Shell Granular Activated Carbon is used to improve the taste and odour and to remove: Chlorine, THMs, PCBs and many other organic contaminants that may be present in the water. The coconut shell granular activated carbon component also includes Riolyte which re-introduces minerals which may be lost during filtration through.
Supplied with filter tap, tubing, connectors & housing spanner. ⅜” tubing
Cartridge life: 94,625 litres or up to 3 years
Cost over lifetime: £0.90/wk
The Paragon Long Life Water Purifier offers 5 stage filtration reducing multiple contaminants in your water including Chlorine, Lead and other heavy metals, Trihalomethanes, Hydroxybenzene Volatile, Chromium, Arsenic, Argentine, Iodine, Hydrargyrum and other effects chlorine has on water.
Not only all of that, this filter is small and compact and installs under even the smallest of sinks either vertically or horizontal without the need to mount it to the side wall.
This is a single use cartridge only and is supplied without a tap or tubing both of which however can be purchased separately. Makes an ideal filter for an existing filter tap or three way kitchen tap.
Cartridge life: 75,700 litres or up to 3 years
Cost over lifetime: £0.76/wk
The Osmio Active Ceramics Small Whole House Filter System is a high performance, long-life, compact whole house water filter system, ideal for smaller homes when space is limited.
Through the active ceramics, the Osmio Active Ceramics Small Whole House Water Filter provides softer, non-scaling water for kitchen and bathrooms and de-chlorinated water which is less aggressive on skin and hair in the shower - perfect for eczema and psoriasis sufferers.
The filter produces pH enhanced water with minerals and increased alkalinity and anti-oxidants in the water too.
Supplied with housing, brackets and housing spanner
Cartridge life: 100,000 litres or up to 2 years
Cost over lifetime: £1.82/wk
The Osmio Active Ceramics House Fluoride Water Filter System is the best whole house filtration system available as it is specifically designed to remove several ingredients, including Fluoride. This filter is suitable for a larger home and will effectively deal with 100’s of ingredients down to 1 micron including Chlorine, Fluoride, bacteria, THM’s, Heavy metals including Lead, Arsenic, Barium, Cadmium, Chromium, Selenium, Mercury, Iron and others.
Tags: long-life KDF Active Ceramics 3 Year