combi pipe work

[sweep]

Sorry if this has been asked before or in wrong place first post.iv just moved to a bungalow and had a valiant ecotec plus fitted 837 r1 fitted (cheap) now the wife has decided she wants new rads fitted old ones scruffy and imperial .the pipe fro boiler is 22mm with eight mill going to rads eight in total im eventually going to convert attic so will need min 3 rads up there as well .am i better to change all the heating pipes to 22mm then branching off this to 15mm to rads if im changing radiators anyway or the 8mm be good enough. p.s thanks in advance stevie

 

[Howsie]

My choice would be to swap for 22 & 15.

 

[diamondgas]

It's a benefit to have larger suplies Stevie. Less chance of blockages and restricted flows, and a much longer life expectancy. However it's also a major undertaking to replace. If your existing pipework has been in 15/20yrs I'd be weighing up the odds towards replacement!

 

[AWheating]

if you have dark brown water lining your 8mm pipework then i would change it, chances are you r boiler will thank you also.

 

[armourer]

That will be 11 rads in total.
I would go for the pipework upgrade. It will save a lot of grief in the long run.

Not a bit fan of microbore systems, I have been called to so many faults.

 

[woodsy]

Agree with other comments, not a fan of microbore, seen too many with leaks/ blockages. 22mm and 15mm the way to go, will be worth it in the long run.