Yes, you should have your unvented hot water serviced at least once a year. Just like you have your gas boiler serviced. Watch the video below to see what could happen should something go wrong. https://youtu.be/iIm6JXQQ8kw Wow, Did you see that? That just shows you what could happen if some form of failure occurred. Let's look at the unvented hot water cylinder and explain [...]
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