Extra Rads On Microbore System. Is This OK?

12 Jan 2008
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United Kingdom
I've got a Broag 28c combi running a 10mm manifold and microbore system. The system originally had an 8 branch manifold, running 4 rads.

As there were no extra tappings on the manifold, I aded an extra rad by teeing into the 22mm F and R pipes, and running 10mm pipe to the new rad. (Shown in blue)

I want to add 2 more rads by doing the same thing (Shown In Red). Will this be OK? I'm sure that the boiler can handle the load, but it won't make anything unbalanced will it? Everything will be in 10mm pipe.

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If you tee into the 22mm you will be ok, if you tee into the exsisting microbre you will be stuffed. Could you not just run another manifold for your extra rads?

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