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Iron: At first, the water is clear, but when in contact with air, stained brown and form deposits on sanitary facilities. Metallic taste. Norm 0.2 mg / l.
Manganese: At first, the water is clear, but when in contact with air, there is a dark shade and form a black precipitate on the sanitary facilities. Metallic taste. Often manganese is supplied with iron. The provision 0.05 mg / l.
Limescale: Hardness salts, Ca and Mg form limescale deposits on sanitary facilities. Limescale is a result of clogged pipes, shower strainers, heaters fouling. Technical equipment rapidly wears out or increases power consumption.
Smell: Just out of the tap to pour cold water felt a specific smell. It can be as foul eggs or swamp.
Bacteria, viruses: Bacteria, viruses, and other pathogens are extremely dangerous to human health but can not be determined visually by looking at water, as they are relatively small. To be absolutely sure of bacteriologically clean water should bacteriological water analysis. The bacteriological water pollution is more common in virzsemes water (rivers, lakes, ponds, open wells) and the centralized water supply networks.
Turbidity: Most often found in drinking water network, especially in times when water pipes are made repair or disconnecting, cleaning and so on. Clear water might contain floating particles that are visible. Turbidity in water is as unexpected, uninvited guest who may appear in the worst possible moments. If the filter will not be installed, all washes clothes could became dirty. As another example, it is unpleasant to take a shower in dirty, muddy water with bad odour.
Organic: It creates a yellowish-brown water and brown precipitate in comparison with iron deposits can be easily removed. Such water is high bacteriologically unsafe.
Increased salt content: it is possible for groundwater, like the seas and oceans. Groundwater total salt content is relatively much smaller than the seas or oceans, but a problem - a precipitate of sanitary facilities, salty taste of the water, etc.
Ammonium: Ammonium ions in potable water may adversely affect the effectiveness of the disinfection of water by impairing the manganese may cause damage to the filter (in water systems containing more nitrate) as well as adversely affect water taste and smell. There is a definite threshold odor of ammonia concentration - 1.5 mg / l (at an alkaline pH), but the taste changes can be detected if the ammonium concentration is 35 mg / l, more particularly, a susceptible individual may feel ammonium ions, even if concentration level lower.
Low pH: Acidity is measured in pH figure of the hydrogen ion concentration of the solution.
pH value indicates whether the environment is neutral, alkaline or acidic. Aqueous solutions of pH can vary from 0 to +14.
If the pH is less than 7, the medium is acidic.
If a pH value greater than 7, the medium is alkaline.
Environmentally neutral pH 7th For example, distilled water pH 7th
Chlorine: Chlorine destroys pathogenic bacteria. And, unfortunately, also destroys the body to the friendly bacteria in the intestine, which strengthens the immune system. Chlorine is linked to cardiovascular disease and cancer, and it is not effective against strong parasites - cryptosporidium. Since chlorine evaporates after left water pipes, many people allowing water to stand for half an hour, thus improving the taste. Chlorine combines with organic substances in the water to form chloroform, cancer-causing chemicals, which does not evaporate.
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Without chemical reagents
Oxidation with air
Regeneration with KMnO4
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