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  1. P

    Is this an airlock...?

    Anyone???
  2. P

    Is this an airlock...?

    We have a heating system which consists of boiler and hot and cold water tanks. Been working fine for a month now (moved in to new place month ago) and then this morning wake up and only luke warm water coming out of hot tap. Pressure fine on both hot and cold taps but just doesn't get hot. No...
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