424.2.6.6.1 Location. Suction inlets shall be provided and arranged to produce circulation throughout the pool or spa.

424.4.6.6.2. Testing and Certification. All pool and spa suction inlets shall be provided with a cover that has been tested and accepted by a recognized testing facility and comply with ANSI/ASME A112.19.8M. "Suction Fittings for Use in Swimming Pools , Spas, Hot Tubs, and Whirlpool Bathtub appliances."

Exception: Surface skimmers.

Important Safety Note: Do not use or operate pool or spa if the suction inlet fitting is missing, broken or loose.

424.2.6.6.3. Entrapment Avoidance. If the suction inlet system, such as an automatic cleaning system, is a vacuum cleaner system which has a single suction inlet, or multiple suction inlets which can be isolated by valves, then each suction inlet shall protect against user entrapment by either an approved antivortex cove, 12 " x 12" grater or larger, or other approved means.

In addition, all pools and spas shall be required to have a backup system which shall provide vacuum relief should grate covers be missing. Alternative vacuum relief devices shall include either:

Approved Vacuum Relief system.

Approved Vent Piping.

Other approved devices or means.

424.2.6.6.4 Suction Inlets Per Pump. A minimum of two suction inlets shall be provided for each pump in the suction inlet system, separated by a minimum of 3 feet or located on two different planes: I,e,.one on the bottom and one on the vertical wall, or one each on two separate vertical walls. These suction inlets shall be plumbed such that water is drawn through them simultaneously through a common line to the pump.

424.2.6.6.5 Cleaner Fittings. Where provided, the 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 operating water level or as an attachment to the skimmer(s).