8mm piping

[2352]

Hi Guys,
Here the big question..
I had recently fitted a new combi boiler which replaced a very old one, which worked on a low pressure closed circuit water. All the CH was working on a 8mm pipes. The guy who did the job did not advice to do repipe the flat with the standard 15mm pipe, but I had other ppl saying I should have had it done. The CH is working ok now for the past 2 weeks with no pipe bursting or evidence that the boiler is loosing pressure due water leack etc, but my big question is will the 8mm pipe be a problem in the long term? Do you think the pipe will hold the higher pressure from a combi boiler? My concern is that i'm reflooring (on top of the exisiting wood floor) so you understand the kind of job I would have if a pipe will eventually burst! What should I do?
Thanks

 

[namsag]

No prob at all having 8mm on a combi providing everything is heating up ok , pressure won`t affect it .

 

[Terrywookfit]

If the pipework has been installed correctly there will be no joints except at the manifold and radiators!!
If there are any joints under the flooring they will be no more likely to leak than 15mm/22mm!!

 

[bengasman]

BUT! you need to take special care to clean the system and keep inhibitor at a proper level.

 

[2352]

Cheers guys for ur answers,
the plumber did check the pipework and he said he looked ok. He actually did replace a joint at the mainfold point: he showed me that a floor board was wearing it by compressing it and he replaced it (at no extra charge). however now that you also confirmed that a 8mm pipework can do the job as well as a -say-15mm i feel much more reassured and go ahead with reflooring

ps just if u fancy explaining it but what does an inhibitor do???

 

[namsag]

basically Its a liquid that goes into the water to protect the rads from rusting. Your installer would have put it in during installation . you may have a sticker on boiler saying its fitted