Heated towel rail valves?
 

My towel rail needs some valves. What's special about "towel rail
valves" apart from looking pretty? The ones I've seen don't appear to
have thermostatic control.
The TRV's which I've seen are all 15mm. This towel rail has 22mm
connections. Is the extra bulk of 15mm to 22mm adapters the best
solution?
I've seen some valves that have 22mm connection but they're not
thermostatic.

As the flow connector is high up on the towel rail and the return at
floor level, What are the disadvantages of having the TRV on the more
easily accessible flow side?
TIA
--
Regards,
Mike Halmarack

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