Herz GP radiator valve 'cogwheel' adapter?
I'm trying to fit a tado radiator thermostat onto my radiators. It looks like i have Herz GP radiator control valves - straight model (5523).
Now underneath the white knob is a little cogwheel on a round thick base which is secured with an allen key.
It looks absolutely nothing like any of the valves in the compatibilty guide:
Does anybody know of an adapter or a way to fit the tado thermostat (without replacing the entire valve with a M30 x 1.5 mm valve?)