A set of 3 replaceable cartridges for filtering systems. Set includes: FCPS (NSF approved), FCCST and FCCBKDF. Cartridges remove sediments such as sand, silt, rust and suspended solids, chlorine, organic substances, certain pesticides, iron, heavy metals. Using the set it is possible to reduce water hardness and improve the taste and aroma of filtered water. KDF exhibits bacteriostatic properties inhibiting bacterial growth and therefore protecting the cartridge. Size is equal to 10". 1. FCPS (NSF approved): Polypropylene spun cartridge. Made using "melt-blown" technique. Cartridge was made using 100% pure polypropylene (without any additives). It removes sediments such as sand, silt, rust and suspended solids. Product was tested and certified by NSF. It is dedicated to cold water filtration. 2. FCCST: Water softening and iron removal cartridge filled with FDA compliant ion exchange resin. Reduces water hardness and the concentration of iron. FCCST2 series cartridge is dedicated for cold water filtration. 3. FCCBKDF: Cartridge filled with NSF approved coconut shell activated carbon and KDF media. It efficiently reduces chlorine, organic substances, certain pesticides and improve taste and aroma of filtered water. KDF reduces the concentration of iron and heavy metals (lead, mercury, arsenic) and exhibits bacteriostatic properties protecting activated carbon from microbiological growth.