I've replaced a new Drayton trv 4 myself on the first week of November with the same issue. Now it's broken AGAIN! I've attached the image here of the broken valve. Can anyone determine what's the cause of this broken valve? Is it the quality or what are the causes??
Can anyone help identify this radiator lockshield/valve please?
It's the one on the right. It's larger than the one on the left.
The nut on the left is about 20mm across flats. The one on the right is about 25mm.
Both going on to 15mm pipework, but the right one seems much larger thread...