What's needed?

Yours looks more like a Honeywell than a Drayton but I can't find a "head only " and I don't know if they are interchangable or not but someone who knows will probably say. They aren't too expensive for the whole valve at SF and then you could just unscrew the top and fit it to yours. https://www.google.com/search?q=Honeywell+Home+Valencia+15mm+x+1/2"+White/Chrome+Angled+Traditional+Thermostatic+Radiator+Valve+Head&sca_esv=5f71ebaa1edf03b4&ei=4YTZZ7HoLc-zhbIPx9P-kAY&ved=0ahUKEwjx3Pae7ZOMAxXPWUEAHcepH2IQ4dUDCBA&oq=Honeywell+Home+Valencia+15mm+x+1/2"+White/Chrome+Angled+Traditional+Thermostatic+Radiator+Valve+Head&gs_lp=Egxnd3Mtd2l6LXNlcnAiZEhvbmV5d2VsbCBIb21lIFZhbGVuY2lhIDE1bW0geCAxLzIiIFdoaXRlL0Nocm9tZSBBbmdsZWQgVHJhZGl0aW9uYWwgVGhlcm1vc3RhdGljIFJhZGlhdG9yIFZhbHZlIEhlYWRIAFAAWABwAHgBkAEAmAEAoAEAqgEAuAEMyAEAmAIAoAIAmAMAkgcAoAcAsgcAuAcA&sclient=gws-wiz-serp
 
Unless the make of the broken TRV head is known then it's a hit 'n' miss whether another head will work, unfortunately they are not all made equal.
 
cawright1 said:
Hi all, ok, couple of pics here. For the record, the ones on the other rads are unbranded, cheap looking things.

This is the broken one ..

ibb.co

IMG-20250319-165555581-PORTRAIT-1 hosted at ImgBB

Image IMG-20250319-165555581-PORTRAIT-1 hosted on ImgBB
ibb.co ibb.co

And it needs to go here ..

ibb.co

IMG-20250319-165624325-PORTRAIT-1 hosted at ImgBB

Image IMG-20250319-165624325-PORTRAIT-1 hosted on ImgBB
ibb.co ibb.co
Click to expand...
Not one I’ve heard of. You could chance it with a trv head, but probably best replacing with a whole new one.
 
I was hoping to just replace the head. Putting a whole new valve on may mean draining my the system etc, bit beyond me all that.
 
Most electronic heads come with a kit
1742439684191.png
so they can fit a range of TRV bases. The eQ-3 and Terrier i30 are stand alone, ⁣⁣ but61dmtMm13BL.jpg1742439835449.png many need a hub as well, home Wi-Fi needs a lot of power, so most battery powered items, need a hub to make the batteries last longer, in the main over a year for TRV heads, I did a quick look for cheap electronic heads, and the SONOFF does seem cheap, and has a great Compatibility Guide which shows all variations.
 

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