WATER HARDNESS
Water hardness - a combination of chemical and physical properties of water, due to the content in it of dissolved salts of alkaline earth metals, mainly calcium and magnesium, commonly referred to as "hardness salts". So a water softener plant must be efficient to remove immense hardness from water
HARD AND SOFT WATER
Water with excess salt content is called hard, with a low content - soft. The term "hard water" in relation to water has historically been formed due to the properties of fabrics after washing with the use of soaps based on fatty acids - the fabric washed in such hard water feels more rigid. This phenomenon is explained, on the one hand, by the sorption by the tissue of calcium and magnesium salts of fatty acids formed during washing at the macro level. On the other hand, tissue fibers have ion-exchange properties, and, as a consequence, the ability to sorb multivalent cations - at the molecular level. In practice, temporary (carbonate) hardness is distinguished, which is reduced by household boiling due to calcium and magnesium bicarbonates Ca (HCO3) 2; Mg (НСО3) 2, and constant (non-carbonate) stiffness caused by the presence of other salts, Hard water, when washed, dries the skin very much, foam is poorly formed in it when using soap. The use of hard water in households causes the formation of deposits (scale) on the walls of boilers, in pipes, etc. At the same time, the use of too soft water can lead to corrosion of pipes, since, in this case, there is no acid-base buffering, which provides hydro carbonate (temporary) rigidity. Consumption of hard or soft water is usually not hazardous to health, there is evidence that high rigidity contributes to the formation of urinary stones, and low - slightly increases the risk of cardiovascular disease. The taste of natural drinking water, for example, spring water, is due precisely to the presence of a normal and natural amount of hardness salts. In order to soften the water, a water softener plant is required
The natural hardness of water varies quite widely and throughout the year and is unstable. Hardness increases due to evaporation of water decrease during the rainy season, as well as during the melting of snow and ice.
AND WHAT IS THE WATER HARDNESS IN
The water hardness of is at the limit allowed by SanPin standards, normalizing the water hardness of 7 units.mg-equiv / l. such an indicator in our region only in winter and in rainy spring, in summer, when the evaporation of water increases significantly, then this indicator rises to 11 rarely to 13 units.mg-equiv / l.
Therefore, when choosing a water purifier, you need to be guided by the fact that the filter should be just for hard water, if you are looking at a reverse osmosis filter , then this is not a problem, they are all designed for hard water, and our company recommends this particular filter segment for Rostov. If you choose triple systems, then be sure to pay attention to the additional softening module, its presence is an extremely important factor in the filter
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