In message , Vikki
writes

Hi

I hope someone can advise me here as I am totally clueless!

We moved into our house about a year ago and inherited a baxi back
boiler and central heating system. We have decided to change the system
and have a combi boiler fitted and this will allow us to have a new
inset fire and get rid of the not so nice one that we have at the
moment.

We have had BG out who have given us a quote which we are happy

Well I suggest getting other quotes, BG have a reputation for charging
well over the odds.

with
and they sent their surveyor out yesterday to measure up. It was all
booked in for next week but as the surveyor was leaving he noticed that
all our pipework is plastic. They are now saying that they can't instal
a combi and we can only have a normal boiler.

And this is an even better reason as he is talking absolute ********.
Did he say why?

We don't want a normal
boiler as we want to get rid of the water tanks in the loft.

find as long as you are aware of the limitations of combis as well.

My husband
has spoken to some of his friends and they have combi boilers with
plastic pipes and can't see what the problem is.

There isn't one, I installed a CH system with mostly plastic plumbing
with a combi it was fine.

We have pulled up the
floor boards so that we can see the pipes and they have written on them
"12 bar/12c 7 bar/82c HBPUK PB" and we have been told that this is more
than okay for what we need.

Yep. Sounds it. A typical combi system will run at about 1 - 1.5 bar
with a maximum pressure of 3 bar.

Is the fact that we have plastic pipes a problem or not?

No. The only consideration IIRC was that the first metre of pipe from
the boiler had to be copper.

If we get a
local plumber out to do it will it be okay

Yes.

or will it start leaking?

No, it shouldn't unless it was improperly installed in the first place -
a risk with any existing system though.

Is
there anyway around the problem other than changing all the pipework?

Yep, get someone who knows what they are talking about to give you a
quote :-)
--
Chris French