The perfect solution for significantly reducing limescale buildup in office and home coffee machines of any size. The limescale filter fits into all water tanks and not only reduces limescale buildup in the tank but also prevents limescale from forming inside the machine. The BWT Bestsave universal limescale filter extends the average lifespan of a machine. It should be replaced periodically to ensure its effectiveness; the recommended lifespan for constant use of the machine is at least 600–700 brews and/or 6 months in the water.