gas pipe size and combi boiler failures.

heating-eng

SallyG wrote: »

We've had endless trouble with our 6 year old combi boiler - I've now got quotes for a new "regulation" /no choice condensing boiler.
All the quotes specify replacing the existing 6 metres of 15mm diameter copper pipe from the meter to the current boiler with a 22mm dia. pipe; could the 15mm pipe size be the cause of fairly regular combi boiler shut downs?
The only other gas appliance we have is a gas cooker - the burner flames sometimes seem low/fluctuating.
The existing combi boiler when it works works perfectly well but seems to shut down randomly.
Is it possible that the boiler isn't getting enough gas to work properly?
I'm wondering if installing a 22mm dia pipe will fix the problem and I won't have to get the boiler replaced.

Would it not be possible to put the boiler on a service contract with somebody like BG .

ihateyes

gas4you wrote: »

Have to agree with above, except it is now being said/proved that trace heaters on condensate pipes are a total waste of time.

the maintenence company i worked for was crippled by the condensate pipes freezing in winter.

heating-eng

ihateyes wrote: »

the maintenence company i worked for was crippled by the condensate pipes freezing in winter.

So was BG........

lemontart

heating-eng wrote: »

So was BG........

here is some very useful info owners of such boilers should print off and keep safe near boiler for winter

http://www.homeheatingguide.co.uk/thawing-frozen-condensate-pipe.html

spinningsheep

We had a new boiler installed in March and specifically asked for an internal condensate drain, was very simple to do, they have simply run it into the sink trap, no freezing condensate pipes this winter I hope! When they were looking at possible sites for the boiler, they suggested various internal drain options, so there would be a solution for most households.

gas4you

If fitted properly, (unlike most BG installs!), an external condensate will VERY rarely freeze up.

heating-eng

gas4you wrote: »

If fitted properly, (unlike most BG installs!), an external condensate will VERY rarely freeze up.

Thousands froze up over the winter from all types of installs.
I even went to a bath that froze.
All external pipes can freeze.

bengasman

heating-eng wrote: »

Thousands froze up over the winter

Correct

heating-eng wrote: »

from all types of installs...

Wrong, only bad installs. I have only once had to go out to ANY of my own installs ( my fault, I completely forgot I'd only done a temporary set up of the condensate ), and never had to go back to ANY that I corrected after they had frozen up.

macman

If the fall and insulation is adequate then it should not freeze. It's water sitting in a pipe that freezes-not when it's flowing.

heating-eng

Like I have said I went to a bath that had frozen up.
BG went to loads that were fitted correctly. You are wrong if you think you can stop them freezing up.
Best practice is to run inside if possible.
Trace heating are a good idea if run outside.
Let's remember the cold weather we had was extreme and is not going to happ en every year.
Keeps us all busy in the winter months, lol