10 or 15mm?

[Goldspoon]

If a house has 22mm running to 15mm for present rads and two rads are to be added is it best to run 10mm from the 15 or stick to 15mm to 15mm.

Any pros and cons appreciated...

 

[mogget]

I'm only a householder, but personally it would depend on the size of the radiators, and the appearance. If they were smallish singles, the pipework was mostly concealed, and the runs weren't too long I'd probably use 10mm.

 

[cider]

The pipes get smaller as load decreases, not smaller for the sake of it. keep it as big as poss.
Sorry don't know any pross or cons but have been to amsterdam a few times and have a cousin in australia

 

[audisport]

If a house has 22mm running to 15mm for present rads and two rads are to be added is it best to run 10mm from the 15 or stick to 15mm to 15mm.

Any pros and cons appreciated...

you run 10mm from a manifold and it depends on the load your taking. What load do you have off the 15mm already. You get about 11,000btus of 15mm so depends on load you already got and want to put onto it

 

[GodKnows]

Hi all,

You can't turn 15mm pipe into 10mm, bad idea, as statedby audisport 10mm has to be run off a manifold, which mean you have to reconfigure the whole pipework. If you aren't proficient in this, and the cost implication you should use minimum of 15mm pipework to the new radiators

Try and keep and bends and 90 degree joints to a minimum. The straighter the pipe runs the better even if you have to go through walls and clip at the required position as well fella.

 

[cider]

Manifolds? 10mm can be off a split system.

 

[GodKnows]

Hi all,

Cider are you an installer or Diyer? If the former, get back on your corse or refresher training If the later, you can do that if you want to reduce the effectiveness of the heating system, but, you will get problems

If you haven't heard of manifolds, I guess you are a diyer.....