GAS PIPE SIZE TO METER

[bobby62]

I have an existing domestic size gas meter installed in my property, but will require a larger meter 16m3 capacity installed to cater for 2no.45kW boilers to serve a large extension. It looks like the supply pipe diameter from the road is 25mm yellow MDPE.

In your experience, have you seen these 1 inch dia. service pipes supplying U16 size gas meters before, and will it be adequate to serve a U16 capacoity meter (normal domestic size is U6 I believe).

Thanks

 

[ChrisR]

It's usually fine, though it would depend on length.
Remember it's higher pressure than after the meter regulator. The supplier (used to be Transco) will assess the available pressure before installing a U16 though.
From the meter on, you'll need a Commercial Gas Engineer, or a canny Domestic one.

 

[bobby62]

It's usually fine.
Remember it's higher pressure than after the meter regulator. The supplier (used to be Transco) will assess the available pressure before installing a U16 though.

Thanks for the quick response. I understand it is National Grid now. Should be no problems then hopefully. I'll see how canny they are!

Length to property will be around 10-15m

 

[doitall]

You need to ask N/Grid what the service pressure is.

 

[swbjackson]

You'll probably be looking at 35mm pipe internally to carry the volume of gas required. The maximum length of 35mm pipe that an RGI with a domestic qualification can work on is around 10m with a U16 meter. Any more than that and you are looking at having someone commercially qualified. If the pipework is installed with a means of isolation close to each of the boilers a domestic installer will be able to work from this point on.

 

[namsag]

Where does it say 10m max of 35mm. ?