Gas supply pipe sizing: why it's checked before installation

What matters most with gas supply pipe sizing

• Gas Safe standards require supply pipes sized for total connected appliance demand
• Pipe length, diameter and bends all factor into whether sizing is adequate
• Other gas appliances sharing the same supply are factored into the calculation
• An undersized pipe found at survey becomes part of the installation scope
• Meter capacity is checked alongside supply pipe sizing

Understanding gas supply pipe sizing before you spend money

Gas Safe standards require the supply pipe to be sized correctly for the total demand of all appliances connected to it, factoring in pipe length, diameter and any bends along the route. Where an existing pipe is undersized for a new appliance's gas rate, either alone or combined with other appliances on the same supply, upgrading a section of pipework becomes part of the installation scope.

Where we deal with this

• Odd Down (BA2) · 8 mi
• Nailsea (BS48) · 14 mi
• Twerton (BA2) · 7 mi
• Westbury (Wiltshire) (BA13) · 13 mi
• Radstock (BA3) · 0 mi

Questions we get asked

Is gas pipe sizing checked on every installation?

Yes — it's a standard part of a Gas Safe compliant survey, regardless of whether an issue is expected.

What if my meter also needs upgrading?

This is identified at survey and coordinated with your gas transporter or supplier as needed.