Fresh coffee starts with cleaner water. Scale build up can affect taste, performance and eventually, the life an espresso machine. The Claro Swiss water filter significantly reduces scale for up to 3 months or 40L of water, and no need to use a descaler. ClaroSwiss Water Filter for the following Espresso Machines: the Oracle Touch (SES990) the Oracle (SES980 - Batch 1750 & up) the Bambino Plus (BES500) the Barista Pro (SES878) the Barista Express (SES875 - Batch 1735 & up) the Barista Touch (SES880) the Dual Boiler (BES920 - Batch 1749 & up) the Duo-Temp Pro (BES810 - Batch 1738 & up) Disclaimer: Please check your existing filter or machine batch code to ensure that the machine is compatible. Disclaimer: periodical descaling will not be excluded by the use of this filter, only reduced in frequency required, depending on water hardness. Removes excess mineral and scale build up.