scroll to bottom of same page, there's the suggested matching rad valves. these are threaded 25mm for the rad and 15mm for your CH pipe
Got it, I thought that one came with valves for some reason, it seems that standard as 15mm push fit for valves.
@Polygon started
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scroll to bottom of same page, there's the suggested matching rad valves. these are threaded 25mm for the rad and 15mm for your CH pipe