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  1. M

    When to replace pump (Grundfos 15/50)?

    Hello everybody! I have a Grundfos 15/50 in my flat and it stopped working the other day. A friend told me that I could take out the screw in the centre of the pump and play around a little bit with a screwdriver in the hole. This little trick did work, and now I have heating in my flat...
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