one radiator with microbore?

[caseyjones1961]

Our central heating system is, I believe, a sealed pressurised system, all the pipe work is 15mm except one radiator in the hallway that has microbore pipe, had a BG engineer round recently and got chatting as we have had numerous issues with the far end of the house(actually a bungalow)rads not getting up to temp etc, he said that the rad with the microbore would be causing problems as it is restricting the flow...kind of makes sense but then why would any half-about plumber/heating engineer have fitted it in the first place and would we be better off getting it converted to 15mm?
I'm guessing this rad was an addition to the original system.
We're due to change the flooring in the hallway soon so if it needs doing, now would be a good time.
Any advice/thoughts much appreciated

 

[TCCHeating]

Microbore was used because if was cheaper and easier to work with.

Did the british gas engineer suggest trying to balance the system?

If the microbore rad has been piped up correctly (off of seperate, peferably 22mm, flow and return pipes) and there are no blockages then balancing the system should work

If you are planning on taking up the floor then first check that the radiator is piped up correcty before converting the pipework to 15mm.

I have seen it before when so called plumbers have piped a radiator straight into just the flow pipe and expected the system to work properly!