Pure water filtration systems allow you to produce great quality drinking water in your home or office. Systems covered in this page are water filtration systems excluding reverse osmosis systems. An advantage of filtration as oppose to reverse osmosis is that water filtration does not strip everything from water, does not create a waste water stream and can produce water at far higher flow rates for less cost. The advantages of reverse osmosis are that it produces purer water than normal filtration which can be conditioned for specific drinking, aquaria and laboratory use.
Sediment Water Filters
Sediment filtration is an effective method of reducing the turbidity of water caused by the presence of suspended solids such as sand, rust, silt, or clay.
Sediment water filters act as a sieve to remove these particles. The important thing to keep in mind is that sediment filters only reduce sediment by filtration. They don't remove chemicals, heavy metals or make the water taste or smell better.
Water sediment filters will usually be in a filtration system before the specialty filters as this helps to prolong the life of the more expensive speciality filters.
Sediment Melt Blown Water Filters
These water filters are manufactured from 100% polypropylene from melt-blown processed filtration fibre. Formed by thermal bond without the use of any binders and adhesives. These filters are designed to have a high contaminant holding capacity and to last longer.
Nominal Rating Industrial Depth Water Filters
Depth filters are manufactured by using four different pore sixe diameter spray nozzles. The four layered structure PP depth cartridge is produced with fine fibres in the inner layer and coarser fibres in outer layer which constitutes four layers of different pore density from the least dense in the outer layers to the most dense in the inner layers in order to filtrate the larger particles first and as you move further into the filter the finer particles are removed.
This design has a high contaminant holding capacity and stops the surface from getting clogged. Therefore, the filters have a longer service life and lower aqua pressure drop. Made from 100% polypropylene these water filters are compatible with a wide range of process fluids and are also formed by thermal bond without the use of any binders and adhesives.
Polypropylene depth filtration cartridges are constructed of thermally bonded polypropylene microfibers to ensure high efficiency. The filters incorporate a rigid polypropylene centre core for increased strength and durability. This thermal bonded micro-fibre construction has minimal fibre release, consistent flow rate and superior filtration performance. It also is not brittle or prone to breakage problems like resin-bonded cartridges.
Pleated Water Filters
These are thin, pleated filters that trap contaminants on their surface. Once the surface is filled, the filter is replaced. (Some high quality pleated filters can be cleaned and reused.) Surface filters are best if you are filtering sediment of similar-sized particles. If all particles are five micron, a pleated 5-micron filter works best because it has more surface area than other filters.
Ceramic Water Filters
Specially designed for royal use in England, this England-made filter with a 0.2 - 0.4 micron hole diameter efficiently filters out any matter with the diameter lager than its hole diameter including bacteria, silt, suspension, Cyanobacteria, pathogen, and viruses in water.
Carbon Water Filter Cartridges
The simple yet effective carbon water filters. These systems are easy to install, relatively inexpensive, and cover the basic functions of filtration. These water filters carbon medium carbon is derived from coconut husk. This absorbs impurities as the water passes through. This form of filter comprises possibly 95% of those in use domestically. They are simple to install, relatively economical, and depending on micron level, will filter out the most deadly of contaminants, Cryptosporidium and Guardia.
Average carbon filters will last a family 6-9 months. Some carbon filters are enhanced by the use of activated nano-silver, which provides extra antibacterial protection, killing around 650 known types of organisms. The minerals in aqua solution can still permeate a carbon filter; these minerals are beneficial to health.
In situations where sediment is a problem it is worthwhile to add a second separate in-line sediment pre-filter. Otherwise the more expensive carbon filter will become clogged up long before its normal lifespan.
A carbon block is a solidified form of honeycombed carbon. It is the best form of water filter but flow rate is significantly slower than with loose carbon charcoal.
Micron Rating: A 1 micron rating or below will inhibit Cryptosporidium and Guardia as the cysts are larger than this in size. Viruses cannot be inhibited by a filter with a micron rating of more than 0.01 microns.
Carbon filters cannot change the pH balance of the water. If you have acidic water, you will still have acidic water, as the minerals causing the acidity will be dissolved and therefore will pass through the carbon filter.
Carbon filters may be susceptible to mould attack if left unused over extended periods. It is important to realize that a filter gathers the 'garbage' in your tap water and the organic component of this garbage is quite capable of rotting. Add a little summer humidity to the already damp internals of a carbon filter and you may have a mould attack. Taste will always be the deciding factor, and if the taste of the water suddenly changes after an extended period of non-use, such as your annual vacation, change the filter.
Note that carbon filters reduce in efficiency the longer they are in use. For this reason it is best to change the filters regularly. An activated carbon filter bearing NSF certification will filter out most pollutants of concern.
How it works: Positively charged and highly absorbent carbon in the filter attracts and traps many impurities.
Used in: Countertop, faucet filters and under-the-sink units.
Gets rid of: Bad tastes and odours, including chlorine. Standard 53-certified filters also can substantially reduce many hazardous contaminants, including heavy metals such as copper, lead and mercury; disinfection by-products; parasites such as Giardia and Cryptosporidium ; pesticides; radon; and volatile organic chemicals such as methyl-tert-butyl ether (MTBE), dichlorobenzene and trichloroethylene (TCE).
KDF Filter Cartridge
This Cartridge uses the patented KDF -55 filtering media which eliminates contaminants from water by utilizing electrochemical oxidation reduction.
Chemical Properties of KDF include its ability to kill algae and fungi, control bacterial growth, remove Chlorine, Pesticides, Organic matter, Rust, Unpleasant taste and odour Hydrogen sulphide, Iron, Lead, Calcium, Aluminium, Mercury, Arsenic and other inorganic compounds.
Combined with an Activated Carbon Cartridge it creates an excellent all round filtration system with an extremely long life capacity.
KDF Media can remove up to 99% of water-soluble lead, mercury, nickel, chromium, and other dissolved metals. The water passes through a bed of a media made of a special high-purity alloy blend of two dissimilar metals - copper and zinc KDF55. This media is a major advancement in water treatment technology that works on the electro-chemical and spontaneous-oxidation-reduction (redox) principles.
Chlorine is instantaneously and almost inexhaustibly oxidized. Iron and hydrogen sulphide are oxidized into insoluble matter and attach to the surface of the media. Heavy metals such as lead, cadmium, and aluminium are removed from the water by the electrochemical process. They are attracted to the surface of the media, much like a magnet. The media inhibits bacteria growth throughout the entire unit.
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