The number one issue affecting espresso machine operation is scale buildup. Prevent scale buildup by filtering water that enters your machine. The Avid Espresso Water Softener Filter can be attached to the intake hose inside your espresso machine’s water tank. Compatible espresso machine manufacturers are Brasilia, ECM, Expobar, Profitec, Quick Mill, Rancilio. Contact us for more information on compatability. Average household use requires replacing the filter every 2 months.