• OPEN BOX: This product is a fully inspected customer return
• COMBIMATE REFILL BALLS 800G: Polyphosphate refill pack for Cistermiser Combimate 15mm and 22mm in-line scale reducers, and other in-line limescale reducers with a refillable dome that take loose balls. Use it in place of a Combiphos refill pack
• POLYPHOSPHATE SCALE INHIBITOR SPHERES: Approx. 800g of glass-like antiscalant balls, not crushed crystals or granules, so the scale reducer refill pours cleanly through the filler hole and fills the dome evenly
• DOME O RING SEAL INCLUDED: Every refill pack comes with one replacement O ring for the scale reducer dome, so you renew the seal at each top up and help keep the unit watertight. Fit one ring only, never two
• HELPS PROTECT COMBI BOILERS FROM LIMESCALE: The polyphosphate dissolves slowly into incoming mains water and helps stop scale building up where water is heated, in combi boilers, water heaters, hot pipes, showers and taps in hard water areas
• EASY 4-STEP REFILL: Slide the cover off, unscrew the ring and empty the old media from the dome, fit the new O ring, then refit the dome and pour the balls in through the top. Always follow your unit's instructions
• REFILL ONCE A YEAR, CHECK YOUR UNIT: A whole-house unit typically uses 800g in about 12 months, so top up at your boiler service. A limescale inhibitor refill, not a water softener, and not for cartridge units or salt softeners

PLEASE NOTE: This item is a customer return that has been fully inspected by the Lava team and carries a 30 day Lava guarantee or the manufacturer's original warranty (if applicable) - whichever is longer.

The Siliphos Balls 800 g Including O Ring refill pack is a high-performance solution for maintaining scale reduction systems in potable and industrial water installations. Containing 800 g of high-grade polyphosphate silicate spheres and a replacement O ring, it supports efficient scale prevention in units such as the Combimate. The glass-like spheres ensure uniform media distribution and effective action across the flow path, while the included O ring ensures a proper seal on system access. Ideal for routine maintenance, this refill pack is suitable for plumbers, servicing engineers and building maintenance teams tasked with managing scale in water systems. Regular annual replacement helps maintain system efficiency and extend the life of appliances connected to treated water.