Which plumbing and gas codes does Chandler enforce?

Chandler City Code Chapter 29 adopts the 2024 International Plumbing Code (IPC) in Section 29-4, the 2024 International Residential Code (IRC) in 29-6, the 2024 International Fuel Gas Code (IFGC) in 29-7 and the 2024 International Swimming Pool and Spa Code (ISPSC) in 29-10. Each section ends with the same history line: Ordinance 5108, adopted December 9, 2024, effective July 1, 2025.

The adoption clause for plumbing reads, in part: "The City Council of Chandler adopts by reference the International Plumbing Code, 2024 edition." It then says the code means the IPC "as amended herein," so the city's changes travel with the model code.

• IPC: the model plumbing code Chandler uses for commercial, multifamily and other non-house work.
• IRC: the residential code. Its plumbing chapters cover one- and two-family houses. Chandler's Homeowner Building Permit Manual points house work to the IRC or Chandler City Code, so a house repipe and a restaurant build-out are governed by different books.
• IFGC: the fuel gas code for gas piping, appliance connections and venting.
• Adopted by reference: the full model code text applies, minus what Chandler deletes or replaces.

The plumbing changes are short. Chandler's own list has four items that matter to plumbing and gas:

Two more amendments matter to owners and are covered on their own pages as they publish: like-for-like replacement exemptions from a permit (IRC R105.2 and IBC 105.2 as Chandler amended them) and the annual facility permit for repeat commercial alterations.

It covers plumbing and fuel gas work inside Chandler city limits, by owners and contractors alike. It does not cover unincorporated county land, where Maricopa County's own adopted code applies, or neighboring cities, which adopted their own editions. Houses follow the IRC plumbing chapters, and everything else follows the IPC.

A restaurant chain reusing its Phoenix plans. The plumbing plans may cite UPC sections, since Phoenix lets the designer pick the UPC or the IPC. In Chandler the reviewer checks them against the 2024 IPC and the city's amendments, so pipe sizing tables, trap rules and the grease interceptor chart are read from different books.

A contractor working both sides of a city line. One job in Chandler and one a few miles east in Gilbert. Chandler enforces the 2024 IPC and Gilbert still enforces the 2018 IPC, so the same detail can pass in one and draw a comment in the other.

A homeowner's gas line. A gas piping job at a house follows the 2024 IFGC, with the permit process from the building code Chapter 1. Chandler has no technical amendments to the fuel gas code, so the model text applies as written.

The edge case: a stale citation. Chandler's city page on grease control still names the 2018 IPC, and City Code 51-25 still says 2012. Neither changes the adopted edition, which is the 2024 text set in 29-4.

1. 1Ask your designer or plumber which code and edition the plans cite. For a Chandler job it should say 2024 IPC or IRC, "as amended by Chandler City Code 29-4."
2. 2Check Chandler's amendments before copying details from another city's approved plans. The grease interceptor chart in 29-4.4 is the one that most directly changes a kitchen build.
3. 3Read the building code Chapter 1 for permit rules, inspections and appeals, because Chandler replaced the plumbing and gas codes' own administration chapters with it.
4. 4Use the city's permit portals for the actual application: Development Services, 215 E. Buffalo St., 480-782-3000, and the online portals linked from chandleraz.gov.

• "Chandler accepts UPC plans like Phoenix does." It does not. Phoenix lets designers choose the UPC or the IPC. Chandler adopted only the IPC in 29-4.
• "The code is 2018 because the city grease page says 2018." The city's Food Service Establishments page still cites the 2018 IPC and Chandler City Code 51-25 still says 2012, but both are stale text. The adopting section, 29-4, says 2024.
• "Houses and businesses follow the same chapters." Houses use the IRC plumbing chapters. Commercial work uses the IPC.