Slow Phos 10" Filter Cartridge

Protect the plumbing, the solar water heater and the heating elements in your home from limescale damage with BEILIN H2O's advanced filter cartridge.

The cartridge works with the proven, safe method of slowly releasing polyphosphate into the water (Slow Phos / Siliphos). The transparent cartridge comes pre-filled with 600 g of original, quality Siliphos granules. The active material coats the calcium and magnesium ions (limescale) and prevents them from crystallizing and sticking to the walls of the pipes and heating elements, keeping the solar water heater efficient and preventing clogs and plumbing failures.

Key benefits

Includes 600 g of original Siliphos (Slow Phos): a large, concentrated amount providing long-term protection for the plumbing and appliances in the home.

Effective limescale prevention: actively prevents limescale crystallization on heating elements (in the water heater, washing machine and dishwasher), saving power and extending appliance life.

Transparent cartridge for visual monitoring: a transparent design that lets you easily see at any time how much Siliphos is left, without disassembling the system.

Reusable and cost-saving: the cartridge is easily refillable – once the material dissolves, simply open the cartridge and refill it with new Siliphos granules without buying a new filter.

Universal compatibility with any filter housing: fits all standard 10" filter housings on the market (whole-house filter housings or a dedicated limescale filter).

Technical specifications

Cartridge size: 10" (international standard size)

Active material: 600 g of original Slow Phos (Siliphos) granules

Physical structure: a rigid, transparent plastic cartridge resistant to working pressures

Recommended renewal: replace or refill every 6-12 months (depending on household water consumption)

Suitable for: preventing limescale in solar and electric water heaters, solar systems, washing machines and main water lines in hard-water areas

Bottom line – why install with us?

Safe, clean installation: a standard, hermetic connection to the main water line to prevent leaks, without affecting the water pressure in the home.

Approved, standard materials: we use only original, durable Siliphos granules approved for use in drinking water.

Routine service and maintenance: on-time refilling of the cartridge and free reminder service, so you're always protected from limescale with peace of mind.