Code Library
Gas Lines: Rules in Phoenix-Area Cities
Fuel gas piping permits, materials, sizing, testing and appliance connections. City by city, then the Arizona law and model code behind it.
Uniform Plumbing Code
All UPC sections- Model Code · Updated Jul 2026UPC 1208: Approved Fuel Gas Piping MaterialsUPC Section 1208 lists which materials are approved for fuel gas piping and how they may be joined. Steel and iron, copper where the gas allows, corrugated stainless steel tubing (CSST), aluminum alloy, and polyethylene (PE) for buried service each have their own limits and joining methods.
- Model Code · Updated Jul 2026UPC 1210: Installing Fuel Gas PipingUPC Section 1210 sets how fuel gas piping is physically installed. It covers underground and concealed pipe, corrosion and impact protection, pipe turns, sediment traps, prohibited locations, and where each manual shutoff valve must sit.
- Model Code · Updated Jul 2026UPC 1211-1212: Gas Appliance Connections and Shutoff ValvesUPC Sections 1211 and 1212 set how a gas appliance is joined to the house gas line. Each appliance needs an accessible manual shutoff valve close to it, an approved connector, and a sediment trap that keeps dirt out of the burner.
- Model Code · Updated Jul 2026UPC 1213: Testing and Inspection of Fuel Gas PipingUPC Section 1213 makes new fuel gas piping prove it is leak-free before any gas flows. The plumber pressure-tests the line with air or another non-flammable gas, an inspector checks it, and the line is purged before appliances are connected.
- Model Code · Updated Jul 2026UPC 1215: Sizing Fuel Gas PipingUPC Section 1215 sets how a plumber sizes fuel gas piping. The pipe has to be big enough to feed every appliance at the same time. The size is based on the total appliance demand in BTU per hour, the length of the run, and the type of gas.
Need The Work Done To Code?
Call a licensed plumber who pulls the permit in your city and passes inspection the first time.