"ernie mendoza" wrote in message
...
I have just had a new Worcester-Bosch 24i system boiler installed in
the loft to replace a 30-year-old non-condensing boiler in the
kitchen. Tests show it is "undergassed". The installer says it may
be a problem with the gas meter governor, in which case they say
Transco would have to fix it. However the 22mm pipe required by the
boiler is connected to a 15mm pipe from the gas meter. Should the
installer fit a larger pipe to the gas meter instead of blaming the
governor and shifting the problem to Transco? Any advice most
welcome.


I'm about to have a similar change with a 30CDi - into the loft. Pipe sizes
cannot be readily checked so I may have the same problems and will need an
external 22mm up to the loft.

Worcester will give good advice if you know the pressure at the boiler. I
had this:

"The recommended working gas pressure at the appliance is 18.0mbar however
the boiler will function correctly when set as low as 16.5mbar. In most
cases when testing the working gas pressure with other devices in the
property this 22mm pipe diameter is necessary. Should your installer be able
to achieve at least 16.5mbar on 15mm pipe-work then the manufacturers
warranty should remain unaffected. "