Upsizing Pipe

[ryan14690]

Hi, Could anyone tell me if it is ok to up the size of pipe from my radiators from 8mm to 15mm?

My current configuration is 22mm from the boiler then it downsize closer to the radiators to 8mm. I would like to upsize from the 8mm to 15mm but in my head i dont think its possible. Might be wrong.

So id be going 22mm > 8mm > 15mm

 

[oldbutnotdead]

It's possible but its unlikely to solve any problems you may be having.
If you could junk the 8mm entirely (so 22mm >15mm) that would definitely improve flow to radiators