10mm pipe supplying 2 radiators

[slippyr4]

Hi All,

I want to extend my heating (which I installed last year) to include my extension - which includes a small utility room and toilet.

The radiators are small, 350W and 300W ish. Because of the concrete floor construction, I want to embed the pipes in the wall.

The question is, is 10mm pipe likely to be ok for supplying both of them, in parralel? or would i need to run separate feeds to each from a manifold?

The first one is about 1.5m from 15mm flow and return stubs that i left under the kitchen floor for when I got round to doing this; the next radiator is about 1m further away, in the same direction.

Thanks

slip

 

[corgiman]

i wouldnt run two off of ten

 

[Agile]

With such a low output they should work fine as long as you very carefully balance then!

Few people seem to be able to properly balance radiators!

Tony

 

[corgiman]

My tuppence still stands

if you can come of the manifold then do it

 

[slippyr4]

thanks for the comments. another possibility is to put 15mm in the wall, and tee off the 15mm in 10mm for each rad. is that likely to work better?

 

[ChrisR]

Theoretically, yes.
I'd agree with Tony - we've all seen worse travesties working. If you use TRV's (which would help with the balancing), note the size of the hole the water has to go through, it's often 4 - 5 mm. I think a metre or two of 10mm would be rather less resistance than that.

 

[corgiman]

I bow to the giants

 

[diyisfree]

Balance rads ? Is that when you try to achieve the return water temp to be the same as the feed ?

Or have i got it totally wrong..

 

[bster]

to me balancing can mean one or both of two things

1- balance rads so they all heat up equally
2- balance rads so they heat up equally and with the required temp differential between F and R's

 

[bab]

i thought ballancing rads was when you carried them up a ladder on a 2nd fix when the stairs were not fitted.

 

[diyisfree]

So is this a case of reducing the flow with the lockshield ?