adding a radiator

[petejames]

The exisitng radiators downstairs are on 10mm plastic, I want to add a new rad using 15mm plastic insulated as it goes into the converted garage underground.

I cannot seem to find a 10x10x15 tee so should a reduce to 10mm before the tee?

Think I should wait till summer

 

[Terrywookfit]

Why would you take a 15mm branch off a 10mm pipe

This must be a wind up!!

 

[petejames]

I was advised that running 10mm over any distance was not a great idea, and i need to go at leat 7meters from the junction to the radiator.

Honest not a wind up, any help appreciated.
Cheers

 

[Terrywookfit]

Unless Both rads are VERY small it will not work.

The larger pipe needs to be before the branch.

 

[petejames]

Thanks for the reply, so here goes...

1300 double and a 600 double downstairs both connect to 10mm copper at the bottom of the combi, not sure how or if I can add another rad to this system. Go the usual 4 radiators upstairs of various sizes.

My problem I thought was the distance, but now looks like the size of the pipes and the age of the combi, I know it needs replacing as its 10years old.

The gas board hate it im sure,

Cheers