Timing
Barriers come before plaster and water
In Mesa, the barrier is not a finishing touch. It has to be approved before the pool is plastered or filled.
This is an independent referral guide. It connects homeowners with independent providers and may receive compensation. It is not a licensed contractor and it does not do the work.
The rule
Mesa's brochure says all required barriers and safety devices shall be installed, inspected, and approved prior to plastering or filling the pool or spa.
Which water features
The requirements apply to pools, spas, hot tubs, and water fountains 18 inches or greater in depth.
Maintenance
Owners must keep barriers, gates, doors, and equipment in good working condition, and no one may remove or alter a required barrier except to repair or replace it in compliance.
Sources
Public pages, linked so you can read the source yourself. Rules change, so confirm the current version with the agency before you rely on it.
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