Ultimate Guide to Gas Line Repair, Installation, and Leak Safety

## Gas Piping Physics and Pressure Requirements Residential natural gas operates at low pressure (approx. 1/4 PSI or 7 inches water column). Proper pipe sizing is critical to ensure appliances receive adequate BTU supply without velocity drops. ## Materials & Installation Safety Code - **Schedule 40 Black Steel Pipe:** Threaded rigid steel pipe coated with gas-rated pipe dope or yellow PTFE tape. - **Corrugated Stainless Steel Tubing (CSST):** Flexible yellow-jacketed gas tubing requiring specialized bonding clamps to prevent lightning strike arcing. ## Emergency Gas Leak Response If you smell mercaptan (rotten egg odor), evacuate immediately, do not operate electrical switches, and call emergency services and gas dispatch at 855-235-1641.