Extending Microbore CH system

[nigel-9sw]

Hi All
My central heating system is 8mm microbore. I wish to replace one radiator in the bathroom and add a towel warmer. Can i add this to the same circuit as the radiator? The manifold feeding the rads are all used up so no option to run new pipes. If I connect these in parallel can I use 15mm pipes or stick with the 8mm?

 

[JPC]

8mm !! thats small

u could add it in 15 but will need balancing well....u'll need to nearly turn the valves off.

teeing off 8 mm is not a really good idea but if thats all u've can do (other than getting a bigger manifold) then do it..

i have done before succesfully.

take to opportunity to cleanse and inhibit ur system

 

[nigel-9sw]

u could add it in 15 but will need balancing well....u'll need to nearly turn the valves off.

Thanks for the advice. What do you mean by 'Balancing' ? Is this to ensure the flow is the same in both the radiator and the towel warmer? Or does it apply to the rest of the system?

 

[JPC]

check FAQ. its to try and ensure equal flow to all rads without anyone taking too much of the flow and starving others