Reverse circulation new build

[fixitflav]

I for one am only interested in helping people and learning.

Agreed, me too (without the hashtag, I'm not claiming to have been molested ). This has been an interesting thread and most of us have learnt something. Be good to hear from Jeff how it turns out.

 

[AWheating]

Sounds like the person who first fixed the pipe work is inexperienced or under qualified. If this is a med to large house builder ask for a copy of the mechanical drawings. Should have pipe work routes and design.

Don't let them fit single checks, they will fail at some point.

 

[Lou]

Hi If you have any questions about advertising on the forums, please pm me.

 

[fixitflav]

Hi If you have any questions about advertising on the forums, please pm me.

OK. When I posted #10 I just thought I'd pasted in a block of text, I didn't realise there was a link in there till johnduffell found it.

 

[fixitflav]

Hi,
I'm looking for a little help. I bought a new build and have heating issues since we moved in. The builder wants the installer to resolve the issues, but hes been back now about 5 times and still the issue persists. I was hoping for a little advice. We have 2 circuits 1 upstairs and 1 downstairs. When the downstairs is on the rads upstairs start getting hot one by one via the return. Whats the best way to get to identify whats causing the issue. Is this issue generally caused by the way the pipes have been run i.e. 22mm to microbore or is it generally the pipework around the boiler. I'm reluctant to pay someone to resolve it, as its the builders responsibility but the plumber the builder keeps sending (the installer) is not fixings the problem and seems to not be able to identify the issue either. Any help or direction would be greatly appreciated.

Any developments on this? I'm sure I'm not the only one interested!

 

[Jeff]

Hi all,

Sorry for the delay in responding. The plumber has now run a second return so the upstairs and downstairs returns now have there own returns and these then combine together to go back to the boiler. However the problem persists with the upstairs still heating up via returns when downstairs heating is on. I’m not sure if he had a clue what the issue is. He’s also altered the pipe work around the boiler, bit to no avail.

 

[fixitflav]

Hi all,

Sorry for the delay in responding. The plumber has now run a second return so the upstairs and downstairs returns now have there own returns and these then combine together to go back to the boiler. However the problem persists with the upstairs still heating up via returns when downstairs heating is on. I’m not sure if he had a clue what the issue is. He’s also altered the pipe work around the boiler, bit to no avail.

I still think we need a schematic of the complete system, to check that it isn't piped (wrongly) as my #36. But that might not be easy to do, if the pipes and connection points are mostly out of sight. I suppose the house is complete and habitable, floorboards down etc? It would be good if installers did as-built drawings, but I don't suppose most of them do.

 

[Jeff]

Does everyone think the pipes follow the 3 t rule? He moved where some of the pipes joined.

 

[Jeff]

Sorry I meant to say he moved the pipe under boiler its the last t on the return now. I think its the Bypass but not sure.

 

[fixitflav]

Does everyone think the pipes follow the 3 t rule? He moved where some of the pipes joined.

View attachment 33925

Excuse my ignorance, but what is the 3 t rule?

He moved where some of the pipes joined.

It depends where they were moved from and to. As I said before, the problem might be remote from the boiler and cylinder. The system might be piped as in my sketch in #36.