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FCCST Aquafilter is a softening cartridge with ion exchange resin for 10-inch filters. It removes calcium and magnesium ions from water, replacing them with sodium ions, which reduces the formation of scale. Recommended for protecting plumbing systems, heating devices, and household appliances. Fits most bodies mounted on pipes and under-sink systems.
The FCCST Aquafilter softening cartridge is an effective filter cartridge for standard 10-inch housings, designed to reduce water hardness and protect installations and appliances against limescale. This water filter uses ion-exchange resin granules that remove calcium and magnesium ions, replacing them with sodium ions. It works well as part of a household water filtration system, in housings mounted on pipes, as well as in under-sink filters, supporting everyday water treatment of utility water.

FCCST Aquafilter is a water softening cartridge with ion-exchange resin granules, designed for use in popular 10-inch housings. Its purpose is to reduce the buildup of calcium and magnesium deposits responsible for limescale formation in installations and appliances that come into contact with water.
The cartridge is recommended for protecting household appliances, heating devices, and plumbing systems. Thanks to its design, it can be used both in housings mounted directly on pipes and in under-sink systems.
The cartridge uses fine-grained ion-exchange resin with a high ion exchange capacity. In practice, this means that calcium and magnesium ions are removed from the water and replaced with sodium ions. This water softening process effectively limits scale formation and improves the operating conditions of installations and appliances supplied with utility water.
The cartridge design has been developed so that water entering at one end and exiting at the other passes through the entire ion-exchange resin bed. This makes it possible to maximize the working surface of the resin bed and increases the cartridge’s effectiveness during use.
Additionally, the cartridge has its own final filter that prevents resin particles from escaping beyond the filter. This is important both for the safe operation of the entire system and for maintaining proper water flow.
The FCCST Aquafilter cartridge fits most 10-inch cartridge housings. It can be used in domestic and utility installations wherever the goal is to reduce water hardness and protect system components against mineral deposits.
It is a practical solution for housings mounted on pipes and for under-sink filters. The cartridge can complement a broader water treatment system, and in more advanced setups it is also used as one of the components working with systems such as an osmotic filter, reverse osmosis filter, reverse osmosis, or a reverse osmosis system, if the design of the entire setup includes a stage for protection against limescale buildup.
To extend the service life of the cartridge, a housing with a mechanical cartridge from the FCPS or FCPP series should be installed before the housing with the carbon cartridge.
Note: cartridge service life depends on water quality.
Hard water promotes limescale buildup in pipes, fittings, heaters, kettles, washing machines, dishwashers, and other appliances that come into contact with water. Mineral deposits can reduce appliance efficiency, increase energy consumption, and shorten the service life of selected installation components.
The softening cartridge helps reduce this problem, which is why it is often chosen as a complement to domestic and utility filtration systems. It is especially useful where utility water has elevated hardness and causes rapid buildup of calcium scale.
| Product type | Softening cartridge with ion-exchange resin granules |
|---|---|
| Brand | Aquafilter |
| Model | FCCST |
| Purpose | Water softening by removing calcium and magnesium ions and replacing them with sodium ions |
| Housing standard | 10 inches |
| Compatibility | Most 10-inch cartridge housings, pipe-mounted housings, under-sink filters |
| Filter media | Technologically treated ion-exchange resin granules |
| Grain size | 0.2–0.7 mm |
| Application range | Cold and hot utility water |
| Additional design feature | Final filter preventing resin particles from escaping beyond the filter |
| Component approvals | NSF and FDA |
| Certificate | PZH hygienic certificate |
The cartridge is used for water softening. It removes calcium and magnesium ions from the water, replacing them with sodium ions, thereby reducing limescale formation in plumbing systems, heating devices, and household appliances.
The FCCST model fits most 10-inch cartridge housings. It can be used both in housings mounted on pipes and in under-sink filters.
The ion-exchange resin granules capture the calcium and magnesium ions responsible for water hardness and then exchange them for sodium ions. This process is what makes water softening effective.
Yes, the cartridge is intended for use with both cold and hot utility water.
By reducing the amount of ions responsible for water hardness, the cartridge lowers the risk of limescale buildup. This helps protect household appliances, plumbing system components, heating devices, and selected industrial machines from mineral deposits.
Installing a housing with a mechanical cartridge from the FCPS or FCPP series before it helps extend the cartridge’s service life. The mechanical filter traps solid contaminants that could worsen the operating conditions of the ion-exchange resin bed.
Yes, the cartridge has its own final filter that prevents resin particles from escaping beyond the filter.
Cartridge service life depends on water quality. The greater the load on the resin bed and the more demanding the operating conditions, the sooner the cartridge may need replacement.
Yes, the cartridge components have been approved by NSF and FDA, and the cartridge itself has a PZH hygienic certificate.
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FCCST Aquafilter is a softening cartridge with ion exchange resin for 10-inch filters. It removes calcium and magnesium ions from water, replacing them with sodium ions, which reduces the formation of scale. Recommended for protecting plumbing systems, heating devices, and household appliances. Fits most bodies mounted on pipes and under-sink systems.