Most people have seen the effects of limescale on the domestic kettle. It is that white chalk like substance that is left on the surface of the kettle.
But What causes limescale?
Rain water is naturally soft when it falls from the sky, but once it reaches the ground, it then passes through numerous types of rock like chalk and limestone. The water picks up "HARD" Calcium and Magnesium minerals, turning the naturally soft water into hard water.
Many people do not feel the effects of hard water, as long as the minerals remain suspended in the water, but when water is heated up, these hard minerals come out of suyspension to form Limescale, which can be damaging to the heating elements and surrounding pipework (Hor Water Cylinder, Coffee machines, Kettles, Washing machines).
The Limescale Cartridges use a media called Polyphosphate which can virtually eliminate corrosion and scale build-up on fixtures and appliances by allowing the polyphosphate beads to slowly dissolve in the water which causes the calcium and magnesium to be held in suspension and not attach itself to the walls of the plumbing system. It basically binds the calcium not allowing it to attach itself. The dissolving beads apply a coating on the inside of the pipes and this also protects the plumbing system from corrosion.