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S A Plumbing & Heating
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So a wise decision is to go in the loft and check the condition of the water in the header tank. A dirty tank indicates a dirty central heating system and perhaps a power flush would be a good idea.
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The problem with both these methods is when filling the heating back up any debris/sludge in the tank will enter the central heating blocking pipes and causing problems.
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There is two ways to isolate the water supply to the central heating. 1. Turn the mains off under the sink stopping the header tank filling. 2. Turn off the supply from the tank usually via a gate valve.
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The problem with draining central heating, especially when its not been drained for a long time is the unknown amount of sludge build up in the pipes and the header tank.
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Now listed on My Local Services for life
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