The development this product was to find an alternative to conventional ion exchange based water softeners, reverse osmosis or other chemical based systems that prevent scale.

Recent restrictions placed upon the above mentioned technology lead to an environment friendly, cost effective solution for hard water, Watchs FILTERSORBSP3. FILTERSORBSP3 completely takes care of the primary cause of scale forming cations viz. Ca2+ and Mg2+.

The working principle is when the hard water under goes nucleation in the pressure vessel, the calcium bicarbonate Ca(HCO3)2 is transformed into aragonite form of calcium carbonate CaCO3sub> crystals. These crystals are formed through decomposition and crystallization process, forming very stable harmless crystals.

The following equation describes the reaction that occurs inside the pressure vessel when flow over grains of nucleation. (Ca(HCO3)2 ? CaCO3 + CO2 + H2O
The name fragment SP (Scale Prevention) 3 is to indicate this unique transformation of water hardness Ca(HCO3)2 into 3 components viz.

1. CaCO3 (micro-crystals)
2. CO2 (colloid) and
3. H2O (pure)

In the pressure vessel, the equilibrium of carbonate species in water is changed, assisted by the driving force of stable crystal formation and therefore the reaction is pushed to the right ?. With this technology, as long as CO2 is being removed the soluble Ca(HCO3)2 converts into insoluble calcium carbonate (CaCO3) crystals.

The calcium carbonate crystals grow steadily. They are very stable and cannot dissolve (incapable of forming scale) in the water. Glass grains crystallization sites provide increased nucleation sites for the formation of submicron sized CaCO3 crystals. Hence this amazing process is called NUCLEATION ASSISTED CRYSTALLIZATION or NAC in short.

The effective average lifespan of FILTERSORB SP3 is 5 to 7 years, depending on the feed water conditions.

Related Documents :

Product Literature
Product Specs
Safety Data Sheet

Additional information


Watch Water USA*




Watch Water

Item Type

Activated Carbon

Item Weight

1.833 lbs per LITER

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