In a multi-unit installation, what is essential to isolate a single unit's gas supply without affecting others?

In a multi-unit installation, what is essential to isolate a single unit's gas supply without affecting others?

• A. Shared main shut-off at building
• B. Only emergency shut-off
• C. No shut-off needed
• D. Individual unit shut-offs

Answer: (D)

Independent shut-offs for each unit let you isolate one unit's gas supply without impacting neighboring units. This enables safe maintenance, leak testing, or emergency work on a single unit while the rest of the building stays supplied. In practice, each unit has its own valve on the gas line feeding that unit, so the gas can be shut off at that point without disturbing others. A shared main shut-off would cut gas to all units, while an emergency shut-off is meant to quickly disable gas service system-wide, not selectively. No shut-off at all would prevent safe work and isolation.

Independent shut-offs for each unit let you isolate one unit's gas supply without impacting neighboring units. This enables safe maintenance, leak testing, or emergency work on a single unit while the rest of the building stays supplied. In practice, each unit has its own valve on the gas line feeding that unit, so the gas can be shut off at that point without disturbing others. A shared main shut-off would cut gas to all units, while an emergency shut-off is meant to quickly disable gas service system-wide, not selectively. No shut-off at all would prevent safe work and isolation.