where after replacing a 15yr old verkona boiler and have had 3 quotes so far 1 was for a baxi boiler which doesnt seem to have good feedback so i dont think we will be going with that.
a vaillant which seems to get good reviews
Now BG have been out with there quote,which apparently! means alot of work which is there reason for a big quote anyway what i need help with...we have a 15mm gas inlet pipe into our boiler at the moment non of the ppl we have had out have mentioned that the gas inlet pipe has to be bigger??? although the specs from the boilers we have looked at say 15mm the guy from BG insists that the other dealers would fit it in with a 15mm pipe but would be wrong by a million mile's and the pipe needs to be bigger as 15mm pipe would make any guarantee null and void???
The gas supply HAS to be 22mm. The size of the gas connection to the boiler is irrelevent.
Not Vaillant or any other boiler manufacturer would state the size of the gas pipe required - because they can't. You need to know the length of the gas run, the amount of fittings used, other appliances that are connected to the carcass, the gas rate of the boiler.
the boiler has a 15mm connection - then it has to be 22mm to within 1 metre of boiler.
If you connect a combi boiler to a 15mm gas supply, the boiler will not operate as efficiently as it should.
The combustion will not be correct.
If you have a gas fire or cooker on and you open the hot tap the cooker or fire will probably go out - causing a dangerous situation.
If the boiler is not installed correctly or the incorrect gas rate is set, then your boiler warranty may also be void.
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