Radiator pipes

[Fallout]

FFS! My post above should have shown corner vs angled but something went tits up!
Personally I'd go for angled with stubs out the wall and then a long street-elbow up into the bottom of angled valves.

Thanks then if soldering the street elbow on the surface is useless a low heat it won't effect the soldered elbow in the wall

 

[dilalio]

Thanks then if soldering the street elbow on the surface is useless a low heat it won't effect the soldered elbow in the wall

Use a long street.
Control flame so as to not overheat.
Test before mounting rads and decoration.. You'll need pushfit caps anyway else plasterer will fill pipes with gear.