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 choice depends on route, access, exposure, support, transitions, local acceptance, installer qualifications, and the manufacturer’s system requirements. Material selection should follow the actual building—not a blanket “better” claim.
What matters in this situation
Gas-line planning should happen before walls close or equipment arrives. Route, pipe size, access, permits, utility coordination, and final testing can all change the practical scope.
Details that help define the next step
- Finished versus open framing
- Route complexity and mechanical protection
- Bonding and grounding conditions
- Local code and manufacturer system
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 finished versus open framing and route complexity and mechanical protection.
- Confirm bonding and grounding conditions and local code and manufacturer system before the scope is finalized.
- Have remodel plans and appliance load schedule ready for the onsite team or authority.
- Use the findings to define the appropriate gas line installation scope, required testing, and any next authority or trade.
What to have ready when requesting service
- Remodel plans
- Appliance load schedule
- Photos before walls close
- Inspection authority requirements
What not to do
Do not mix proprietary CSST fittings or ignore manufacturer bonding instructions. Keep relevant tags, notices, equipment information, and safely obtained photos available for the people handling this specific situation.