Water and filters

Test your water

Scale is the main thing that kills these machines, and it is decided by the water you put in. Profitec's limit is 4 °dH, which is about 70 ppm. One major retailer gives a working range of 35 to 85 ppm.

1. Test your tap water with hardness strips or a TDS meter every 3 to 4 months, and whenever you move house.
2. Above the limit, use a softening cartridge in the tank or bottled water in range.
3. Avoid distilled or pure reverse-osmosis water; retailers advise against it.

Change the filters

There are two filters. A softening cartridge, if you fit one, hangs in the tank: change it every 2 to 3 months, or monthly on very hard water.

The small in-line filter (C439900695) sits in the silicone tube between the tank and the pump:

1. Unplug. Undo the six screws on the back panel with a 2.5 mm hex key and lift the panel up and out.
2. Pull the silicone tube off both ends of the filter.
3. Push the new filter in and refit the panel.

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