replacing optima d4 valve required fitting
Can't find this one so quick.
Please send in a ticket with a photo of the old thermostat and the Optima D4 valve:
It is not really clear for me where you are referring to.
I assume you want to know what valve you need for a replacement of an on/off valve on a radiator?
The Smart Radiator Thermostats are only compatible with thermostatic valves. The compatible measurements are: M30x1,5
Sorry about not being clear on what I meant.
My current rad valve is an Optima D4, I have purchased a tado smart radiator starter kit but I am having some problem replacing my existing valve with the tado. Basically I need to know what adapter I should use? does this make any sense!!
Its sorted ok