If you smell gas:
Leave the building immediately. Do not operate any switches. Call Spire Energy from outside at 1-800-887-4173.
Gas Line Services in St. Louis — Repair, Installation, Appliance Hookup & Leak Detection
Licensed & Insured · Permitted Work · Spire Energy Coordination Available
Gas line work in St. Louis requires a licensed plumber or gas fitter. Natural gas supply is provided by Spire Energy, which operates the distribution lines to the meter. From the meter inward, interior gas piping and all appliance connections — including connections for tankless water heaters, gas ranges, dryers, and outdoor appliances — are the homeowner's responsibility and require permitted, licensed work.
What Our Gas Line Services Cover
Gas Line Repair
Repair of leaking, corroded, or damaged gas supply lines — including flexible connector, black iron pipe, and CSST repair.
View Gas Line Repair detailsNew Gas Line Installation
New gas supply lines for ranges, dryers, fireplaces, generators, and outdoor grills. Includes permit coordination.
View New Gas Line Installation detailsAppliance Hookup
Gas connection for ranges, dryers, fireplaces, whole-home generators, and outdoor appliances with pressure testing.
View Appliance Hookup detailsGas Leak Detection
Pressure testing and electronic leak detection for suspected gas leaks in interior piping.
View Gas Leak Detection detailsWhich Gas Line Service Do You Need?
"I smell gas inside my house"
→ IMMEDIATE ACTION: Leave building, call Spire Energy at 1-800-887-4173 from outside. After Spire clears the distribution line, call us to inspect interior piping.
"I'm adding a gas range or dryer and need a gas connection run"
→ Appliance Hookup or New Gas Line Installation depending on whether a gas line exists in that location.
"I want to install a tankless water heater and need the gas line assessed"
→ New Gas Line — likely needs upsizing from ¾-inch to 1-inch for tankless BTU demand.
"My gas company detected a leak on my interior piping (post-meter)"
→ Gas Line Repair — with pressure testing to locate and repair the specific leak.
"I want to add a gas fireplace insert or outdoor gas connection"
→ New Gas Line Installation — new branch run from existing supply.
How We Handle Gas Line Work in St. Louis
Assessment and Permit Coordination
All gas work in Missouri requires permits for new line installation and significant repair. We confirm meter loop capacity — adding a tankless water heater at 150,000–199,000 BTU requires meter loop assessment through Spire Energy.
Gas Line Work with Safety Protocol
We shut off gas supply at the appropriate isolation point before starting. All connections are made with proper fittings. CSST connections require proper fitting torque and bonding. All new work is pressure-tested: typically 10–15 PSI for 30 minutes minimum.
Pressure Test, Inspection, and Restoration
Full pressure test, check all connections with electronic gas detector and soapy water test, verify appliance operation, and restore gas service. For permitted work, we coordinate inspection before closing walls.
What Affects Gas Line Service Cost?
Appliance hookup
Connection of a gas appliance to an existing nearby gas line: $200–$400 including flexible connector and shutoff valve.
New gas line installation
New branch line from an existing supply: $400–$1,200 depending on run length, pipe routing, and wall access. Permit fees typically $75–$150 additional.
Gas line upsizing (for tankless)
Upsizing existing ¾-inch to 1-inch for tankless water heater: $400–$900 depending on run length from the meter.
Gas line repair
Flexible connector replacement: $200–$350. Section repair in black iron or CSST: $300–$600.
Leak detection service
Pressure test and leak location for post-meter interior piping: $200–$400. Applied toward repair if approved on the same call.
What Our Customers Say
"Had a gas range installed and needed a new line run from the basement supply. Plumber assessed the meter loop first, confirmed capacity, ran the line through the floor, and connected the range. Permitted work, everything passed inspection."
"Spire came out for a suspected gas smell and flagged a leak at a flexible connector behind the stove. After they confirmed it was the interior piping, our plumber replaced the connector and pressure-tested the whole system. Done same day."
"Tankless water heater installation that required the gas line to be upsized. Plumber explained the BTU demand, confirmed the existing line was undersized, and ran the new 1-inch line from the meter. All permitted. Whole job done in one day."
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Gas Line Services Across St. Louis
Gas Line Services FAQ
Need Gas Line Service?
Licensed, permitted, pressure-tested. Call now or request a free quote.
314-237-0332