installing my boiler, advice please

I can reply to a couple of things:
You do still need a full flush even if you are having new rads as I have just had this done, and the pipes can still have loads of muck in them.
If you are talking about single or double convectors - doubles are bigger than singles and kick out a hell of a lot more heat. I suggest you go to a plumbing trade place and look at the BTU outputs for comparison.

Also the ones with grills which you are talking about are the "compact" type rather than traditional "round top". You can buy both in lots of different options. We bought ours from PTS.

matty_hunt wrote: »

No, but this is the point of my post really. I was under the impression that I need certification by a corgi engineer to show safe and correct installation of my boiler. I am competent at installing the boiler myself, but not connecting the gas. What I really wanted to know is how much work I can complete before getting the corgi engineer involved but still get them to certificate it. I assumed I could do everything, bar the gas, get the corgi guy in to redirect the gas pipes, connect, test system and certificate. Are you saying they need to be more involved inorder to cert. If so, how involved? What can I do myself and still get certified?
thanks

So, when you say "no" I think that the word you're looking for is "yes".

How can he certify your work? you are not a corgi registered operative and he is not qualified to tell if you're competent. It is not legal to notify someone elses work and why any corgi would even consider doing this is just completely beyond me.

The correct route to go down is to pay for someone from building controls to check your installation and then you can get your certificate. Now all you have to do is find a corgi registered buildings inspector.

espresso wrote: »

Surely the OP is asking exactly what work needs to be done by a corgi registered engineer. e.g. Can he install his new central heating system himself and then call on the services of a corgi engineer to connect the boiler to the gas supply and check that the boiler is functioning correctly?

As I have said, if he has installed the boiler then a corgi cannot register it. There are no options on the form to say "I have just installed the gas line". If you really want a corgi to register the boiler that you have installed, then he will disconnect and remove the boiler and flue from the wall and then put it back on again. Since there is no point in this, very few people would go for it.

As another poster has said, "we installed our own, saved £3K and never looked back etc etc" I agree.

So, go ahead and do it. Save the money but don't expect some third party to risk his corgi registration or his public liability insurance so you can save a few quid. If you do find someone prepared to do it then great, but be warned very few corgis will be impressed by the ill-informed precedent of a few posters on MSE and remember that you cannot force anyone else to take responsibility for your problem.

Now, didn't I see something on here about safety being more important that money saving?

cajef wrote: »

Would seem to me a bit like someone servicing their own car than asking a garage to sign the service book to say it has been done properly, it may be working but is it roadworthy.

No I would disagree with that analogy. Lots of DIYers service and maintain their own vehicles, even full engine rebuilds which have nothing to do with if it's roadworthy, the annual MOT determines that. It's understandable why DIYers do their own installations, if this is the response that they get from the so called professional engineers!