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Underfloor heating vibrating (Read 1217 times)

RBlue68

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Underfloor heating vibrating
May 17^th, 2021, 8:56am

Hi there , looking for some help with underfloor heating . I have just moved into my new house and the underfloor heating is constantly knocking . Only happens on one zone , when that zone is off it’s all fine . Any suggestions on what to do ? I have listened to the 6 pipes and it’s impossible to tell which one it is that’s knocking .

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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Underfloor heating vibrating Reply #1 - May 17^th, 2021, 10:17pm Almost certainly the zone valve, how old is the system? A possible alternative could be a thermostatic valve connected the wrong way round. As much information as possible please, ideally with some pics showing the manifolds and zone valves
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