WATERRO Big Blue 20" Refillable Empty Filter Cartridge The WATERRO Big Blue 20" Refillable Empty Filter Cartridge is a durable, reusable cartridge designed for customised water filtration systems. It allows the use of various filtration materials, such as activated carbon, ion exchange resin, KDF media, Siliphos crystals, zeolite, polyphosphate crystals and other loose filtration media. The cartridge is compatible with all standard 20" Big Blue filter housings and provides an economical, long-lasting and environmentally friendly water treatment solution. Key benefits Refillable cartridge Large 20" Big Blue capacity Suitable for various filtration media Durable food-grade polypropylene housing Easy to refill and clean Reduces operating costs Environmentally friendly design High water flow rate Compatible with all standard 20" Big Blue housings Long-lasting and reliable operation Applications Suitable for whole-house water filtration systems, commercial and industrial water treatment systems, agriculture, reverse osmosis pre-filtration and customised filtration solutions. Technical specification Parameter Value Product type Refillable empty cartridge Size 20" Big Blue Material Food-grade polypropylene (PP) Refillable Yes Filtration media User’s choice Designed for Cold water Compatibility Standard 20" Big Blue filter housings Package contents 1 × WATERRO Big Blue 20" Refillable Empty Filter Cartridge Choose WATERRO for flexible, economical and sustainable water filtration solutions.