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Drayton RT212
You know that you can get valves from Wickes / other plumbing places without the head on?
M30 x 1.5 is pretty standard these days too.
NotThamesWater-
I did not, but as I was buying a load of other stuff from Toolstation I'm comfortable with that being a lesson learned. Plus, two of the Tado units got fucked by the plasterers so I'll need at least two of the sensing heads until I can be arsed to source replacements (at the plasterers cost).
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Cheapest I could find were from toolsation I think and they came with the TRV.
stevo_com
cjr
Yes, I know. I explained it before but not sure if it was this thread. I have Tado smart sensing heads. The TRVs (the actual valves) are a model that needs an adaptor for the Tado sensing head to screw onto. So I want to replace with a model that doesn't need an adaptor (a Drayton RT212 with an M30 x 1.5 thread). Plus, the bedroom one is leaking a drop or two of water every time the plunger/pin is actuated.
Eventually all the TRVs in the house will be replaced. But the leaking one is a priority and the other two on that floor don't have rads connected (plastering/decorating those rooms), so I'm taking advantage of A) not having to bleed those radiators, and B) the system being drained down past that point to deal with the leaky one anyway, to get all three changed.