New gas range, dryer, outdoor grill, or fire pit? STL Plumbing Pros installs gas lines for residential and light commercial applications. Need a gas line for a tankless water heater? We handle the upsizing. Every installation is pressure-tested, leak-checked, and inspected to meet St. Louis code requirements. We handle the permit — you just enjoy the new connection.
What We Install Gas Lines For
Gas ranges and cooktops — converting from electric or new installation.
Gas dryers — more efficient and faster drying than electric.
Outdoor grills and BBQ islands — no more propane tanks.
Fire pits and outdoor fireplaces — permanent gas supply.
Tankless water heaters — often need a larger gas line than the existing one.
Our Process
Plan the Route
We assess the most efficient and safe route for the new gas line, determine pipe size based on BTU demand, and pull the required permit.
Install & Connect
Run the gas line using black iron or CSST (flexible gas line), make the connection to the appliance, and install a shutoff valve.
Pressure Test & Inspect
We pressure test every new gas line at 15+ PSI for 15 minutes, check all connections with electronic leak detection, and schedule the code inspection.
What Does Gas Line Installation Cost?
| Service | Price Range | Details |
|---|---|---|
| Gas Range / Cooktop Line | $300–$600 | Short run from existing supply |
| Gas Dryer Line | $250–$500 | Includes shutoff valve |
| Outdoor Grill / Fire Pit | $500–$1,200 | Longer run with burial requirements |
| Tankless Water Heater Upsize | $400–$900 | Larger diameter gas line |
| Permit & Inspection | Included | We handle the permit process |
* Prices are estimates. We provide exact pricing after diagnosis. No hidden fees.
What Our Customers Say
"Ran a gas line to our new outdoor grill. Clean work, passed inspection first try. No more propane tanks."
"Converted from electric to gas range. They ran the gas line and had it inspected — we were cooking that evening."
"Needed a larger gas line for a tankless water heater. They upsized the line and connected everything perfectly."