Microbore heating

[derekrook]

I want to add an additional radiator  to my existing gas fired central heating system which is plumbed with 15mm & 22mm pipes. As the new rad will be positioned some 3 to 4 metres away from the nearest suitable connection to existing system I would prefer to use 10mm microbore pipe.  Will this provide sufficient flow or will supplementary pump be required ?  

[Tweed]

At a guess, if it's only one radiator it should be fine.

[landie]

I think you're referring to minibore derek. It should be fine. My system is microbore (8mm) and I have added the odd radiator without hitch.