How to choose a water filter

To receive daily potable water and cooking of food, enough to buy a water filter. Choose quality and suitable for your needs to help filter this article.

2016-03-11 22:11:07 195

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Methods for cleaning up

Before buying a water purification device, it is necessary to determine the quality of water from the tap. You can use the expert data for the analysis of water in your area, or invite a professional who will make the on-site analysis. Knowing the composition of the water, it is easier to determine the filter selection.

To provide water purification filters catches harmful impurities contained in water: chlorine, lead, fluoride, bacteria, rust, sludge. The goal of treatment - to make the water suitable for drinking, washing and cooking. In one water treatment device may have one or more purification steps. The more, the more water will be clean.

Mechanical cleaning is the most crude way of filtration. When the water passes through the porous or fibrous filler structure removed there from large foreign particles. Mechanical filter set, when present in water, sand, rust and other impurities in the size of 5 - 500 microns.

Adsorption involves the absorption of impurities filter media, such as activated carbon. Chlorine is removed from the water, phenol and its derivatives, as well as most organic compounds. This method is used when it is necessary to purify the water and still maintain her present in minerals. Particularly relevant it is when taking water from a well.

Ion exchange is used to remove water from heavy metal ions (iron, copper, lead, cadmium, nickel). Passing through the resin, the fluid is cleaned of these contaminants, while saturating the hydrogen ions and sodium. This method of treatment allows to make water, even in a city apartment suitable for drinking without the threat of harmful effects of impurities.

Ultra clean means retention filter to 0.5 micron particles. This is necessary in areas with very poor quality water, as well as in private homes where the water rises from the well.

Membrane filtration is a relatively new treatment technology. It passes through the membrane only water molecules, and the smallest particles, viruses and bacteria are retained. The output is a perfectly pure water suitable for drinking and preparing baby food. These devices include ultra filtration (particle size 0.1 - 0.01 micrometers) and reverse osmosis (retards particle size to 0.0005 mm). The disadvantage of this type of filtering that is obtained after purification by almost distilled water, which is good to wash, but it loses all taste, as with harmful ingredients disappear and minerals.

Electrochemical purification is based on the destruction of contaminants in a unit electric field. The main advantage of this treatment is a high performance and no need to change cartridges. However, the device is not cheap, so it is becoming for large volumes of water consumption in private homes and businesses.

Water softening

Special softeners eliminate water from soluble salts. This is necessary to reduce the scale by heating water in an electric kettle, washing machine or dishwasher, as well as reduces the risk of kidney stones. Especially recommended to install water softeners in their homes, where water is classified as rigid and very stiff. The devices can be used alone, or included in a complex multi-stage water purification.

Softening can be done one of two ways. The chemical method of clearing the resin absorbs water calcium and magnesium ions. Such a device requires a recovery filter layer - regeneration is due to the addition of the salt solution. Magnetic method involves the formation of a magnetic field: converted into salts ions micro crystal's that do not precipitate inside the household appliances, and are carried with the water flow. Such a softener does not require maintenance.

Filter Type

Jug - the most common and affordable cost filter for home use. This is a plastic container in the form of a pitcher with a built-in filter cartridge. Water is poured into the funnel and passed through the cartridge, purified, into the lower part of the tank. Use purified water can not at once - you need to let the water pass through a filter, which takes some time. Pitcher is convenient because the filter is not attached to the water system, which means it can be used anywhere: in the apartment, cottage, office, etc...

When purchasing a filter jug ​​should pay attention to the volume of the lower reservoir, which may be from 2 to 4 litres. If the family is large and the water will be used not only for drinking, but also cooking, it makes sense to choose a model with a large volume.

Portable Filter - hermetically sealed container with built-in filter - used for water purification in the campaign in the country, at work, on travel. Due to the small volume of the device can not boast high productivity and, as a rule, is designed for individual use. Although there are options for camping, designed for 4 - 6 people.

The nozzle on the facet - inexpensive and easy-to-use tool for water purification. Attached to the mixer nozzle connecting to the housing, where the filter element. The design is usually a switch, which allows to use a mixer with or without filtration, for example, to wash the dishes. Depending on the structural features of the device clean water can be fed directly from the mixing nozzle through the nozzle or through a hose leading to the free-standing container. Such a device is usually chosen, if for some reason there is no way to install a built-in filter.

Flow purifier connects to the water pipe system and consists of a block with several filter cartridges, and a separate tap for supplying purified water. The device is usually bought at the stage of replacing or installing a new kitchen sink, as it requires more crane installation, but nothing prevents to connect the system at any time.

One major advantage of the flow of the water purifier - you get the purified water in the tame moment when you open the facet. However, much more importantly, in this filtration process water passes through a number of different filters, each of which purifies the water from the type of impurities, which is designed for. In other words, this type of filtering is much more effective than, for example, the one that is used in filter jugs. Finally, the flow-through water purifier enables not only to use water for drinking but also for cooking or washing.

Dispenser - a stand-alone device for cleaning and storage of purified water. For its dosing in case there is one or two taps (hot and cold side). In some models provided for connection to the water supply, while others - Hand pouring water into the tank. A filtration system as in running water treatment is carried out in several stages. Such devices must be connected to the mains. Floor models are very similar in appearance to the office cooler (by the way, they successfully replace them and allow you to save on buying a bottle of water). If the design includes a storage capacitance, its volume may exceed 10 litres. Desktop dispensers can be used in cottages and apartments - their amount is typically less than 5 litres.

Particulate Filter is built into the water supply to the water supply at the point of demand. If you need to clean all the water, it is mounted to the wiring to plumbing and appliances. When you need to specifically protect, for example, a washing machine, a filter is attached directly to the place of supply of water to it. If appliances sensitive to the pressure indicators, establish a pre-filter with gear - a special valve to reduce the pressure. In addition the working pressure when selecting pre-filter also necessary to take into account the thread diameter to fit under the existing pipe.

The post filter is used for purification of the filtered water, giving it more quality, for example, disinfects or mineralizes. Can be integrated in the water supply in the area of ​​water in the kitchen sink. There are also post-treatment cartridges for the flow of water purifiers with multiple stages.

For hot or cold water

Most filters are designed for purification of cold water - the upper temperature limit is typically 35 - 40 ° C. If you plan to incorporate elements in the hot water circuit, for example, to feed in the bath or shower, you should choose the elements that can withstand heat up to 95 ° C.

Maximum capacity

Performance filter - an indicator of how many litres of water it can be cleaned in a minute. Depending on the type and number of filter cleaning steps may be the maximum value in some models of less than 1 l / min (filter jugs) others - up to several hundred litres per minute (in the main filters embedded in water).

The resource of the filtering module

Resource filter module is usually indicated in litres - this volume of water, which he is able to pass through itself for all time to complete loss of cleaning efficiency. It may range from a few dozen to several thousand litres.

Depending on the water consumption of selected products with the appropriate resource. For example, if you buy a filter exclusively for drinking water, we can calculate the total water consumption per day. For a family of three, the figure will be about 6 l - means the cartridge with a resource of 500 litres. enough for about 3 months. Filter with a resource in the 6000 - 8000 litres. will last about a year, then it is necessary to replace the filter.

It should also be borne in mind that different filters with a resource in a multi-stage filtration system may be different. For example, in the same filtering flow system in which the characteristics specified shared resource 8000 l water softening filter may have resource 500 l, and the pre-filter - 8000 litres. This means that the softening filter should be replaced every three months, and the pre-filter - once a year. Pay close attention to that change individual filters on time.


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