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  1. SteveBloke

    Seimens M28 Trv body to Drayton Wiser Smart TRV (M30)

    Hi, I recently bought a bunch of smart trv's for my home radiators, I fitted 7 of them to 7 radiators with no issues at all, the other 5 radiators have Seimens trv's on them and they have a 28mm thread. The Drayton Wiser Smart TRV's have a 30mm thread. I've been looking around for an adaptor...
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