Transform hardness. Prevent scale. Preserve essential minerals.
FILTERSORB® SP3 is an advanced scale-prevention media based on Nucleation Assisted Crystallization technology. It helps prevent limescale without salt, chemical dosing, ion exchange or regeneration.
Developed by Watch Water® Germany, FILTERSORB® SP3 transforms dissolved carbonate hardness into stable, non-adhering calcium-carbonate microcrystals. Calcium and magnesium remain in the treated water, while their scale-forming behavior is altered. Unlike conventional sodium-based softeners, the process does not replace hardness minerals with sodium and requires no brine-producing regeneration cycle. The technology is suitable for residential, commercial, food-service and industrial applications where scale prevention—not hardness removal—is the primary objective[cite: 3].
No salt. No chemicals. No regeneration. No wastewater.
Scale prevention without removing calcium and magnesium.
One media.
Comprehensive scale protection.
FILTERSORB® SP3 can be integrated into point-of-use, point-of-entry, commercial and industrial systems. It is particularly suitable for equipment where carbonate-scale accumulation reduces efficiency, restricts flow or increases maintenance.
Residential and Whole-House Water
Suitable for faucets, pipelines, showers, toilets, dishwashers, washing machines, water heaters and whole-house systems.
Hotels, Restaurants and Food Service
Protects catering equipment, coffee machines, tea makers, ice makers, vending machines and commercial water heaters.
Boilers and Heating Systems
Helps protect hot-water boilers, combination boilers, central heating, pool heaters and heat-transfer surfaces.
Cooling Towers and Heat Exchangers
Suitable for open- and closed-circuit cooling towers, heat exchangers, air-conditioning equipment and water coolers.
Food, Beverage and Process Water
Supports wineries, dairy processing, breweries, beverage production, coffee preparation and other mineral-sensitive applications.
Industrial and Special Applications
Suitable for manufacturing, injection moulding, irrigation, nurseries, car washing, swimming pools, spas and reverse-osmosis pretreatment.
Four advantages engineered into one scale-prevention media
Nucleation Assisted Crystallization
Catalytic nucleation sites transform dissolved carbonate hardness into stable calcium-carbonate microcrystals instead of allowing hard scale to develop on equipment surfaces.
Calcium and Magnesium Remain in the Water
FILTERSORB® SP3 does not operate through ion exchange. It retains calcium and magnesium and does not replace them with sodium.
Protection Across Hot- and Cold-Water Systems
Stable microcrystals are designed to remain suspended instead of attaching to pipes, heating elements, boilers, heat exchangers and other connected equipment.
No Salt, Regeneration or Brine Discharge
The system requires no regeneration chemicals, dosing pumps, electrical connection or drain connection for normal NAC operation.
Science &
Technology
FILTERSORB® SP3 uses a directed crystallization process that changes the physical behavior of carbonate hardness without removing the hardness minerals from the water.
- Catalytic Nucleation – Hard water flows across the active surface of the media beads, where nucleation sites initiate calcium-carbonate crystal formation.
- Microcrystal Growth – Calcium-carbonate crystals develop on the media surface and grow into stable submicron structures. The existing page states that the observed reaction time is normally around five seconds.
- Crystal Detachment – After reaching a certain size, the microcrystals detach from the media and continue through the water in a suspended, neutral form.
- Non-Adhering Hardness – The transformed crystals are intended to have a lower tendency to adhere to pipes, heating elements and other surfaces, including hot-water applications.
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