You can buy small replaceable in line filters that also inhibit the build up of scale. They come in diff sizes and with differing capacity for filtering & inhibiting. If your machine doesn't have much throughput of water in domestic use, and is not on all the time (the heat brings the scale out of solution to form that hard crust in the boiler & lines) that should do. Ask you local filter shop for this, specific to the water in your area. Unless you are in an area known to be a very bad area for water hardness, don't worry, your machine is not going to clog up, implode and then disintegrate into a million pieces through the build up of scale, particularly if you havent suffered service problems due to this in the 2 years you've already had the machine. Just get yourself a good filter/inhibitor for the area, change regularly, and you'll be fine. G. not into undue scare mongering.
