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International Building Code
Chapter 31, Special Construction - IBC 3109.5
Entrapment Avoidance
3109.5 Entrapment avoidance. Suction outlets shall be designed to produce circulation throughout the pool or spa. Single-outlet systems, such as automatic vacuum cleaner systems, or other such multiple suction outlets whether isolated by valves or otherwise shall be protected against user entrapment.
Sections 3109.5.1 through 3109.5.4 Add new sections to read as follows: (G146-03/04)
3109.5.1 Suction fittings. All pool and spa suction outlets shall be provided with a cover that conforms to ANSI/ASME A112.19.8M, or a 12" x 12" drain grate or larger, or an approved channel drain system. Exception: Surface skimmers
3109.5.2 Atmospheric vacuum relief system required. All pool and spa single or multiple outlet circulation systems shall be equipped with an atmospheric vacuum relief should grate covers located therein become missing or broken. Such vacuum relief systems shall include at least one approved or engineered method of the type specified herein, as follows:
1. Safety vacuum release systems conforming to ANSI/ASME A112.19.17, or
2. Approved gravity drainage system.
3109.5.3 Dual drain separation. Single or multiple pump circulation systems shall be provided with a minimum of two suction outlets of the approved type. A minimum horizontal or vertical distance of 3 feet shall separate such outlets. These suction outlets shall be piped so that water is drawn through them simultaneously through a vacuumrelief- protected line to the pump or pumps.
3109.5.4 Pool cleaner fittings. Where provided, vacuum or pressure cleaner fitting(s) shall be located in an accessible position(s) at least 6 inches and not greater than 12 inches below the minimum operational water level or as an attachment to the skimmer(s).
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