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.
By City
| City | What the rule says |
|---|---|
| Valley-Wide | Gas Line Burial Depth Rules in Each Valley City Metal gas pipe goes at least 12 inches below grade everywhere compared here. Plastic goes 18 inches in Mesa, Gilbert, Queen Creek, Buckeye, Surprise, Tolleson and the county. Phoenix allows 8 inches for a single outdoor appliance line; Mesa, Gilbert, Queen Creek, Surprise, Tolleson and the county deleted that exception (Tolleson 12-1-20). |
| Gas Line Permits in Each Valley City Yes, in all 13 jurisdictions compared here. Adding, extending, replacing or repairing gas piping takes a permit and inspection; only portable appliances and minor part swaps are exempt (Tempe 8-105). Phoenix and Scottsdale issue outdoor-appliance lines without plan review, while Chandler, Mesa and Buckeye want a piping diagram with every appliance's BTU load. | |
| Gas Line Pressure Test Rules in Each Valley City It depends on the city. Phoenix, Chandler and Buckeye test new gas piping at 1.5 times working pressure, never under 3 psig. Mesa, Gilbert and Queen Creek require at least 10 psi, and 60 psi for welded pipe or gas above 14 inches water column (Mesa 4-7-2, Gilbert 10-35-2, Queen Creek 7.2.6). | |
| Getting Gas Turned On After Inspection in Each Valley City Not until the gas work passes final inspection. Phoenix, Mesa and Maricopa County bar connecting fuel until the building official authorizes it, then clear the gas utility to turn on. In Phoenix a meter locked for a leak on the customer's side needs a permit and city clearance; a non-payment lockoff goes straight to Southwest Gas (TRT 00930). | |
| Phoenix | Do you need a fire permit for a propane (LP-gas) tank in Phoenix? Yes. Phoenix Fire Code 105.6.16 requires a Fire Department construction permit to install, alter or modify an LP-gas system, and Phoenix added small vapor-service tanks at single-family homes (Group R-3) to the list. Containers over 125 gallons also need construction documents, and some storage needs an operational permit under 105.5.30. |
| Chandler | Chandler City Code 29-7: International Fuel Gas Code Adopted Chandler City Code 29-7 adopts the 2024 International Fuel Gas Code for gas work in the city, effective July 1, 2025 under Ordinance 5108. Its only amendments delete the fuel gas code's Chapter 1 and replace it with Chapter 1 of the 2024 International Building Code, so permit and administration rules come from the building code. |
| Do you need a permit to add a gas line in Chandler? Yes. Chandler's Homeowner Building Permit Manual says adding a gas line inside the home, or tying into an existing gas stub out, calls for a gas riser schematic from the meter showing every appliance, its BTU rating, and each line size and type. A new line from the meter must be buried at least 12 inches below grade. | |
| What are Chandler's rules for underground gas pipe? Buried metal gas pipe must be factory-coated and at least schedule 40, galvanized pipe and fittings are banned underground, and a new line from the meter sits at least 12 inches deep. PE plastic needs a continuous 18-gauge copper tracer wire and can't run under a building slab or structure. | |
| What pressure test does Chandler require on new gas piping? Chandler's Homeowner Building Permit Manual requires new gas piping to be tested at no less than 1.5 times the proposed maximum working pressure and never below 3 psig, for at least 10 minutes. Most homes, propane included, test at 3 psig. The test runs through the open valve and flex line, capped at the appliance. |
Uniform Plumbing Code
All UPC sections- Model CodeUpdated 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 CodeUpdated 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 CodeUpdated 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 CodeUpdated 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 CodeUpdated 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.