409.3 Shutoff Valves for Multiple-House Line Systems

Where a single meter is used to supply gas to more than one building or tenant, a separate shutoff valve shall be provided for each building or tenant.

In multiple tenant buildings, where a common piping system is installed to supply other than one- and two-family dwellings, shutoff valves shall be provided for each tenant. Each tenant shall have access to the shutoff valve serving that tenant's space. A main shutoff valve shall be installed in a common utility room or otherwise located to provide ready access to all tenants of the building, and it shall not be located in a locked room without prior permission from the building official.

In a common system serving more than one building, shutoff valves shall be installed outdoors at each building.

Each house line shutoff valve shall be plainly marked with an identification tag attached by the installer so that the piping systems supplied by such valves are readily identified.