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Water Terminology


It represents the micron rating of a filter and it indicates that any particle larger than a specific size will be trapped within the filter.


When a solid takes up molecules into its structure.

Acid aerosol

Very small liquid or solid particles that are acidic and are small enough to become airborne.

Acidic water

When pH is less than 7

Acid neutralizing capacity

Measure of the buffering capacity of water; the ability of water to resist changes in pH.

Acid rain

Rain that has a flamboyantly low pH, due to contact with atmospheric pollutants such as sulphuric oxides.


The quantitative capacity of water to neutralize a base, expressed in ppm or mg/L calcium carbonate equivalent. The number of hydrogen atoms that are present determines this. It is usually measured by titration with a standard solution of sodium hydroxide.

Activated carbon

This is the most commonly used adsorption medium, produced by heating carbonaceous substances or cellulose bases in the absence of air. It has a very porous structure and is commonly used to remove organic matter and dissolved gases from water. Its appearance is similar to coal or peat. Available in granular, powder or block form; in powder form it has the highest adsorption capacity. It is used in our activated carbon filter MF-1100, MF-1000, MF-600, MF-500, MF-450, MF-410 and MF-400 series.