Gas line hookup for a fireplace: what it is and when you need it
Updated Sep 2026·National·Installation
What is a gas line hookup?
A gas line hookup runs or connects the gas supply to a fireplace, log set, stove or insert, including the shutoff valve and the pressure test. In most states this is licensed work and the person doing it holds a gas fitter's or plumber's license — which license, and who issues it, varies by state, and a chimney company may or may not hold one.
When is it actually needed?
Whenever a gas appliance is installed, moved, or reconnected after work on the hearth.
What standard does it answer to?
NATIONAL · IRCNATIONAL · MANUFACTURER INSTRUCTIONS
- The International Residential Code (IRC) — the model building code for one- and two-family homes, adopted and often amended state by state and city by city.
- The manufacturer's installation and service instructions — for a listed appliance or component, they are the specification it was tested to.
What should the invoice or report show?
Ask to see the license of whoever makes the gas connection, and for the pressure test and the permit to be documented.
What does it cost?
Quote after inspection. We have no researched national range for a gas line hookup, so expect a written quote once someone has looked at the job — with the work named on its own line.
Does your state regulate this?
VARIES BY STATE
The IRC is a national model document, not state law: which edition applies to your home, if any, depends on the codes your state and city have adopted. Manufacturer instructions travel with the product: they set its requirements wherever it is installed, separately from the building code. Licensing, permits and what is allowed for a gas line hookup differ by state, and sometimes by city. Gas connections are licensed work in most states — normally a gas fitter or a plumber, and for propane sometimes a separate LP permit. Which license applies, and who issues it, is set state by state, and sometimes by city. Our 50-state laws table and licensing by state set out what each state requires.
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Questions about a gas line hookup
When is a gas line hookup needed?
Whenever a gas appliance is installed, moved, or reconnected after work on the hearth. The work answers to the IRC and the manufacturer's instructions.
Is a gas line hookup regulated by state law?
The IRC is a national model document, not state law: which edition applies to your home, if any, depends on the codes your state and city have adopted. Manufacturer instructions travel with the product: they set its requirements wherever it is installed, separately from the building code. Licensing, permits and what is allowed for a gas line hookup differ by state, and sometimes by city. Gas connections are licensed work in most states — normally a gas fitter or a plumber, and for propane sometimes a separate LP permit. Which license applies, and who issues it, is set state by state, and sometimes by city. Our 50-state laws table and licensing by state set out what each state requires.
What should I ask before agreeing to a gas line hookup?
Ask to see the license of whoever makes the gas connection, and for the pressure test and the permit to be documented.