New gas supply needed to a boiler?

[bengasman]

Not in my experience either obviously.
I am not privvy to info if, and how ofter they do it, but they have the power if the want to.
But even if they don't, if you are in the bad books and have inspections on a regular basis, it would be a real pain in the neck. If not lower.

 

[kevplumb]

I've just had a new system boiler fitted (40cdi Greenstar Worchester).
The existing supply was 3/4 inch (22mm) and supplied a Ideal Mexico boiler (v. old but worked find) and it also goes around to an 8 hob gas cooker.

8 ring hob will be about 15 kW, if not more. Add 40 Kw for the boiler and you are looking at the best part of 60 kW in total.
Not a snowflake's chance in hell that it will meet the spec if that is partially fed by 22mm.

The new supply was 25mm.

Are you sure it is 25?
Copper comes in 22, 28 and 35 normally

thats 3/4"" iron