If you smell gas nowLeave the building without using switches, flames, or phones indoors. From outside, call 911 if there is immediate danger and call your gas utility. Contact a private-side contractor only after the area is declared safe.
The short answer
The repair plan should map isolation boundaries and decide whether unaffected equipment can remain available. Gas piping, boiler controls, combustion, and venting are separate diagnostic domains that may require coordinated trades.
What matters in this situation
Commercial and multi-unit gas work adds operational consequences: multiple occupants, shared piping, equipment schedules, inspection coordination, and the need to document what can safely remain in service.
Details that help define the next step
- Boilers and branches affected
- Manifold and regulator arrangement
- Heating or process criticality
- Utility or inspector status
These details help establish scope; they do not replace an emergency response, onsite inspection, utility decision, permit requirement, or manufacturer instruction.
How a careful service process is organized
- Start by documenting boilers and branches affected and manifold and regulator arrangement.
- Confirm heating or process criticality and utility or inspector status before the scope is finalized.
- Have equipment schedule and mechanical drawings if available ready for the onsite team or authority.
- Use the findings to define the appropriate commercial gas line repair scope, required testing, and any next authority or trade.
What to have ready when requesting service
- Equipment schedule
- Mechanical drawings if available
- Shutdown and occupancy constraints
- Facility and boiler-service contacts
What not to do
Do not bypass safeties or operate a boiler with suspected gas-piping leakage. Keep relevant tags, notices, equipment information, and safely obtained photos available for the people handling this specific situation.