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Health Products - Water Purifiers

Water Filtration & Purification - What system do you need?

Filters are not always an option, however you can improve your water quality by blessing or energising it as described in this video.

There are a wide range of filters and purifiers available. You see them in shopping malls and mail order catalogues.

The prices range from $50 to thousands of dollars. What we all want to know is... which one do I need? It is our hope that the following will help you to understand what each system does and how much they should cost. Please note that we do not sell filters.

Jug Filters are a cheap and easy option that give you a reasonable tasting water and remove some contaminants.
They are generally a Granular Activated Carbon (GAC) filter with a life of around 100 to 150 litres. Some jug filters also incorporate de-ionising crystals, but this effect will only last for a few jug fills. Jug prices average about $30.00 and refill cartridges are about $10.

Sediment filters are used to screen out particles . These systems are generally used on water supplies that are visibly dirty or or have a risk of cryptosporidium/ giardia. Commonly they are 50 microns, 20, 10, 5 and 1 m. There are 1000 microns to a millimeter. The sediment filter is often combined with or integrated into other types of filters. Such filter will have a micron rating. Note that giardia has a micron rating of 5, so a giardia safe filter will need to have a rating of 1 micron.

Some sediment filters are washable. This means that the diriment is washed off giving the filter a longer life. This is only practical for filters over 5 microns.

Granular Activated Carbon (GAC) and Carbon Bock Filters are primarily used to filter out chlorine, particles (due to integral sediment screens) and bad taste. This system will also remove organics, herbicides, pesticides, some viruses and detergents. The granular carbon filters usually have a micron rating of 25, are now less popular since the advent of carbon block cartridges. Carbon block cartridges let water flow through faster and can have micron ratings as low as one. Carbon filters are the most widely advertised.

KDF Filters: are usually combined with carbon. KDF has a brown metallic substance, that when water passes through it, creates an electro-chemical reaction. It crates a current of 0.4 volts that should change chlorine into chloride etc, which is less harmful and is easier to filter. KDF coupled with carbon produces a filter with a longer life than carbon alone. KDF will remove a small quantity of some heavy metals.

Mixed Bed Resin and De-Ionising Crystals: use ion exchange particles to "filter" out heavy metals. They are usually combined with carbon and sediment filters so as to catch chlorine and particulates as well. This system requires frequent filter replacements to maintain optimum efficiency.

Distillers work by evaporating water, leaving contaminants behind, re-condensing it and collecting in a container. This system results in very pure water which is suitable for short cleansing diets and topping up your car battery. Distillers remove approx 99.99% of total dissolved salts from the water. Dissolved salts are very difficult to remove as they are dispersed evenly in the water at a molecular level. Fluoride exists as a dissolved salt. One disadvantage however is that they also remove free oxygen from the water as well resulting in a flat oxegenless water (this is toxic to goldfish) Waste flavour can be improved by using a carbon filter, and distiller boiling trays need to be cleaned regularly.

Reverse Osmosis is a system that requires water pressure to work, (absolute minimum of 40 psi) Water is forced though a very fine membrane, the mesh holes are measured in angstroms, There are 10,000 angstroms to a micron. Most gasses and some water will pass through this membrane, but water contaminants will not. The result is very pure bubbly water. Reverse Osmosis will remove approx 98% of total dissolved salts when new. One disadvantage is that that it disposes of 4 times as much water as it purifies. However for the average family home this amounts to les than one washing machine cycle per week. or less than 1% of total household waste water. Reverse osmosis will also purify sea water fo drinking.

Filter Comparison Chart



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