A typical UK house on the standard arrangement in IGEM/G/1 Figure 3 (supply up to 75 mbar, meter up to 6 m³/h). Not to scale: the gas parts are drawn larger than the rooms. Sources: IGEM/G/1 Edition 3 (2025), Defining the boundaries between the Network, primary meter installation and installation pipework: Sections 3 to 5 and Figure 3. IGEM/G/4 Edition 2, Definitions for the gas industry.