Can anyone explain what type of cylinder this is, my mate has just bought an old house and not seen anything like a thermostatic valve on the pipe! Connected to a back boiler. Many thanks
It isn't a Cyltrol valve, it looks like it might be a Drayton Tapstat. If so it will have a tiny braided flexible tube going to a temperature sensing bulb under the insulation. It is not a wire, so don't cut or kink it.
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