What plumbing inspections does Mesa require? City Code 4-1-5 rough-in, concealment and final

Subsection (A) starts with the rule everything else hangs on. Work that needs a permit is "subject to inspection by the Building Safety Director," and it "shall remain accessible and exposed for inspection purposes until approved." Keeping it exposed is the permit applicant's duty, and the city is not liable for the cost of removing or replacing material to allow an inspection. An approval also does not excuse a code violation. The permit holder must post a visible property address at the site before the first inspection.

The required stages for plumbing work are:

• Concrete slab and under-floor (B)2. Made after in-slab or under-floor building service equipment and piping is in place, but before any concrete is placed or floor sheathing goes on.
• Plumbing, mechanical, gas and electrical systems (B)3. A rough inspection made "prior to covering or concealment, before fixtures or appliances have been set or installed, and prior to the framing inspection."
• Fire-resistant penetrations (B)7. Joints and penetrations in fire-resistance-rated assemblies stay visible until inspected. A plumber running pipe through a rated wall or floor should expect this one.
• Final (B)11. Made after all work required by the permit is complete.
• Other inspections (B)8. The Building Safety Director may require additional inspections to check compliance.

Subsection (C) covers building service equipment, which includes plumbing. Equipment that will be hidden by a permanent part of the building cannot be concealed until inspected and approved, and a final inspection follows installation. Equipment regulated by the technical codes "shall not be connected to the water, fuel, or power supply, or sewer system until authorized." There is a carve-out for replacement equipment serving an occupied part of the building, which may operate once its inspection has been completed and approved.

Subsection (E) puts the burden of asking on the permit holder or their authorized agent, and (F) says work cannot go past the point of each successive inspection without approval. The inspector either marks that portion satisfactory or tells the permit holder what fails, and projects with failed inspections may be subject to additional fees under the city's Schedule of Fees and Charges.

For gas piping, subsection (G) adds a hard stop. After a passed final gas inspection the city issues a certificate of inspection and sends a copy to the serving gas supplier, and it is unlawful for the supplier to turn on gas or a gas meter until that certificate has been issued.

The city's inspection page lists three ways: through your online account in DIMES, by the automated phone line at 480-644-2428, or by text to the same number. You need the permit number and a three-digit inspection code. The page lists regular inspections Monday to Friday, 6:30 am to 5:00 pm, excluding holidays, with after-hours slots available for an additional fee. It also repeats the rule: request inspections at each stage of construction before concealment or cover.

• Rough inspection. The check of pipe, vents and connections while they are still visible, before walls, floors or fixtures hide them.
• Building service equipment. The plumbing, mechanical, gas and electrical equipment that serves a building.
• Building Safety Director. The city official who administers the permit and inspection process. Inspectors act for this office.
• Concealment. Anything that hides the work, such as concrete, drywall, insulation or ceiling tile.

Anyone holding a plumbing permit in Mesa, whether a contractor, a general contractor's subcontractor or an owner doing permitted work. Work that is exempt from a permit under 4-1-4 has no inspection stages, but it still has to meet code.

A restaurant remodel. The plumber roughs in new floor drains and a hand sink, and the pipe stays exposed until the rough passes. Only then does the wall get closed, and the fixtures go in before the final.

A replacement in an occupied suite. A tenant's equipment is replaced while the space stays open. Under 4-1-5(C) the equipment may run once its inspection has been completed and approved.

The edge case. A crew covers a pipe run after hours to meet a deadline. The permit holder has to make the work accessible again, and under (A) the city is not liable for the cost of removing or replacing what covered it.

1. 1Confirm your job needs a permit. If it is on the exempt list, there are no inspection stages.
2. 2Post the property address at the site before the first inspection.
3. 3Book the in-slab or rough inspection before anything hides the pipe.
4. 4Keep the work exposed until you have the inspector's approval, and correct anything the inspector lists before booking again.
5. 5Book the final when all permitted work is complete, and do not connect regulated equipment until it is authorized.

• "The inspector can look at it after drywall." The code says the work stays accessible and exposed until approved.
• "A passed inspection means everything is legal." An approval is not an approval of a code violation.
• "The city pays to open the wall back up." The city is not liable for the expense of removing or replacing material to allow an inspection.
• "The inspector will come on their own." The permit holder has to notify the city when work is ready.