working pressure at meter

[Puddle]

in that case almost every run of 28mm gas in london is ncs as they nearly all start with a three quarter meter connector

You are now talking about a fitting,there would be no more restriction than a gas isolation valve
The point in question is running a gas supply in a smaller pipe size and then increasing it to a larger pipe size,this is not allowed and most gas safe engineers know that fact
The issue would be the ammount of gas that can pass through the meter and the pipework size supplying that meter,you should not be going over that size
As said in my previous post you may get away with 28mm from 22mm but that does not make it right, were do you stop 35mm from 22mm,100mm from 22mm

 

[stevetheplumber]

You are now talking about a fitting,there would be no more restriction than a gas isolation valve
The point in question is running a gas supply in a smaller pipe size and then increasing it to a larger pipe size,this is not allowed and most gas safe engineers know that fact
The issue would be the ammount of gas that can pass through the meter and the pipework size supplying that meter,you should not be going over that size
As said in my previous post you may get away with 28mm from 22mm but that does not make it right, were do you stop 35mm from 22mm,100mm from 22mm

i will take issue with one of your statements as i read it your saying pipework should not exceed the size of the supply pipe as my meter is supplied by three quarter barrel and i have a 28 mm service your saying this is wrong?

 

[Puddle]

The meter makes no differance to the point
You can have 3/4" supply coming into your dwelling and 28mm coming off,not because of your meter but because of the govenor fitted to the meter,this allows higher pressure to be supplied down the 3/4" pipework than is used on your side of the meter ,this makes it possible,because the pressure loss due to extra pipework volume can be compensated for,if the govenor was not there,just the meter,then no, you can not have larger pipework
And the size of the pipework you can have is governed by how much the increased pressure is on the supply side of the governor not meter
I would add and of course you will be restricted by the volume of gas able to pass through the meter

 

[stevetheplumber]

The meter makes no differance to the point
You can have 3/4" supply coming into your dwelling and 28mm coming off,not because of your meter but because of the govenor fitted to the meter,this allows higher pressure to be supplied down the 3/4" pipework than is used on your side of the meter ,this makes it possible,because the pressure loss due to extra pipework volume can be compensated for,if the govenor was not there,just the meter,then no, you can not have larger pipework
And the size of the pipework you can have is governed by how much the increased pressure is on the supply side of the governor not meter
I would add and of course you will be restricted by the volume of gas able to pass through the meter

not what you said first time "The issue would be the ammount of gas that can pass through the meter and the pipework size supplying that meter,you should not be going over that size"
im well aware of how a guvenor works

 

[Puddle]

not what you said first time "The issue would be the ammount of gas that can pass through the meter and the pipework size supplying that meter,you should not be going over that size"
im well aware of how a guvenor works

Sorry if I have offended you steve,of course I know you are quite aware how a govenor works,I thought we were just having a discussion about a issue,I did not mean any disrespect😱