Do you need a permit to install a sprinkler system in Chandler?

The Landscaping section of the Homeowner Building Permit Manual opens: "Landscaping does not generally require a permit. However, a permit is needed to install an irrigation system (but no plan review is needed). This permit allows inspectors to check the installation of the required anti-siphon valve or pressure backflow preventer and electrical timers."

The same section sets the installation details:

• Who installs: it is recommended that a licensed contractor install the anti-siphon or vacuum breaker assemblies. If someone else does, the assembly has to be positioned correctly, with the arrow pointing in the direction of water flow.
• Solder: "The use of lead solder is prohibited."
• Piping before the assembly: aboveground piping may be copper or galvanized pipe. If PVC is used, it must be protected from physical damage and be sunlight resistive. Connecting piping in the ground before the assembly must be buried at least 12 inches deep.
• Height: vacuum breakers are installed a minimum of 6 inches above the flood level rim of the fixture or device. The flood level rim of hose connections is the maximum height at which any hose is used.
• Timers: the inspector needs access to the main electrical panel to check the circuit breaker, which must be compatible with the panel brand. Electrical timers may not "piggy-back" on another circuit breaker.

• Anti-siphon valve or vacuum breaker: a device that keeps irrigation water from being drawn back into the drinking water line. The manual names it but does not define it.
• Pressure backflow preventer: the other assembly the manual names. Chandler's code defines a pressure vacuum breaker as an assembly with a loaded check valve and a loaded air inlet valve, with test cocks and shutoff valves.
• Flood level rim: the manual's reference point for the 6-inch height. For hose connections it is the highest point a hose is used.
• No plan review: the permit is an inspection permit. You still apply, but you do not submit drawings for review.

It covers anyone installing an irrigation system in a Chandler home landscape, owner or contractor. It does not say a permit is needed for repairing or replacing parts of an existing system, because the manual's sentence is about installing one. Scottsdale spells that case out as permit-free. Chandler's manual is silent, so a repair that changes the backflow assembly is a question for the city.

Commercial sites follow different rules for the same device. Backflow assemblies go on the plans before the building permit under 52-36(H), and landscape and irrigation must be accepted before a certificate of occupancy under 35-1907.

A new backyard. The owner hires a landscape contractor for turf and drip lines. The system needs a permit, and the inspector checks the vacuum breaker height, burial depth and timer circuit.

A DIY install. The owner buys an assembly at a store and installs it with the arrow backward. The manual's own warning is about that: if someone other than a licensed contractor installs it, position it with the arrow pointing in the flow direction.

The edge case: the shared breaker. An owner adds the new timer to an existing circuit. The manual forbids piggy-backing on another breaker, and the breaker must be compatible with the panel brand.

A swap on an existing system. A broken valve is replaced. Scottsdale calls repair of existing irrigation piping permit-free. Chandler's manual says nothing either way.

1. 1Apply for the irrigation permit through the city's online permitting site at developmentpermits.chandleraz.gov/clics, or call the Permitting Rep of the Day at 480-782-3074.
2. 2Set the vacuum breaker at least 6 inches above the flood level rim, with the arrow pointing with the flow.
3. 3Bury the supply piping that feeds the assembly at least 12 inches deep and keep lead solder out of the job.
4. 4Put the timer on its own breaker and make sure the inspector can reach the main panel.
5. 5Schedule the inspection through the automated line at 480-782-3100 before midnight for the next day.

• Myth: Landscaping never needs a permit. The manual says "generally," and sprinklers are the named exception.
• Myth: No plan review means no inspection. The permit exists so inspectors can check the backflow assembly and timers.
• Myth: Any height works. The manual sets 6 inches above the flood level rim as a minimum.
• Myth: A home permit covers a commercial site. Commercial irrigation also has the plan and certificate of occupancy rules above.

This page explains the manual. The city's adopted codes govern.