4 rads to fit in extention, what pipe size?

[obseen16]

hi guys this might sound really stupid but i am fitting some radiators in an extention. the builders forgot to mention there were 4 and i only thought there were 3. they are going 2 up and 2 down. they will be on either side of the walls. now because my brain was turned off i ran 15mm pipework to feed these, trouble is im not sure if i should have used 22mm. will these rads work porperly with only 15mm pipe runs? im guessing they may take longer to heat up.

at the moment they have a vented ch system but are toying with the idea of a combi boiler.

hope you can help, thanks all.

J

 

[BrianL]

If its only 2 rads up and down it will be ok, best practice 22mm then 15 mm tails but it will be ok.

Brian

 

[obseen16]

thanks brian. i was sweating my nuts off thinking i had to do the runs all over again. i knew best practice was to do 22mm runs, i think my brain must have just turned off or something, ill know for next time.

cheers,