PIPE SIZE

[pooleys2003]

I need to extend existing central heating into small extension to feed 3 rad's of a total of about 5000 BTU. I need to come off last rad in hall ( bungalow) on 15mm pipe. Q. Is it worth going to 22mm for the runs to the rad's, ie. going from 15mm(existing) to 22mm and back to 15mm or just stay 15mm for the whole run ? These extra rad's will bring the total to 10.(total BTU not worked out ).
Any advice will be gratefully accepted. [/b]

 

[chr15]

You may end up having to do a bit of balancing but 15mm should be fine.

 

[pooleys2003]

Cheers for the reply m8.