3.11.8.1. Recirculation Systems (1) Every public pool shall be equipped with a recirculation system. (2) For the purposes of this Subsection, the water in a public pool and its recirculation system shall be deemed not to be potable water. (3) The water in a public pool and its recirculation system shall be separated from the potable water supply and from the sewer or drainage system into which it drains by air gaps or other devices that prevent (a) the water in the pool or its recirculation system from flowing back into the potable water supply, and (b) the water in the sewer or drainage system from flowing back into the pool or its recirculation system. (4) The recirculation system of a public pool shall be designed, constructed and equipped to comply with Sentences (5) to (20). (5) The recirculation system of a public pool shall be capable of filtering, disinfecting and passing through the pool each day a volume of water of at least (a) in the case of a Class A pool, other than a modified pool or a wave action pool, six times the total water volume of the pool, (b) in the case of a Class B pool, other than a wave action pool, four times the total water volume of the pool, (c) in the case of a modified pool, three times the total water volume of the pool, and (d) in the case of a wave action pool, six times the total water volume of the pool. (6) A recirculation system shall be equipped with a flow meter registering the rate of water flow. (7) All pools shall be provided with automatic make-up water devices and provided with water meters to register the volume of all make-up water added to a public pool or its recirculation system. (8) Equipment shall be installed to continuously disinfect the water in a public pool by means of (a) a chlorination or hypochlorination system provided with a chemical controller for regulating the dosage of chlorine and capable of providing not less than (i) in the case of an outdoor pool, other than a wave action pool, 300 g of chlorine per day per 10 000 L of total pool capacity, (ii) in the case of an indoor pool, other than a wave action pool, 200 g of chlorine per day per 10 000 L of total pool capacity, (iii) in the case of an outdoor wave action pool, 1 200 g of chlorine per day per 10 000 L of total pool capacity, and (iv) in the case of an indoor wave action pool, 800 g of chlorine per day per 10 000 L of total pool capacity, or (b) a bromination system capable of maintaining in the pool water a total bromine residual of 3 mg/L. (9) Gas chlorination equipment for a public pool shall contain a mechanism whereby the chlorine feed shall automatically terminate whenever the recirculation system ceases to supply clean water to the pool. (10) All exposed potable water piping and chlorine piping within a public pool water treatment service room shall be colour coded by means of (a) painting the entire outer surface of the piping, or (b) coloured bands at least 25 mm in width that are spaced along the piping at intervals of not more than 1 200 mm. (11) The colour coding referred to in Sentence (10) shall be yellow for chlorine and green for potable water. (12) Except for a modified pool and wave action pool, a public pool shall be equipped with overflow gutters or surface skimmers connected to the recirculation system that are capable of removing surface film from the surface of the water and withdrawing each day and discharging to the waste drains up to 15% of the total volume of pool water. (13) A public pool shall be equipped with clean water inlets arranged in conjunction with surface skimmers or overflow gutters to provide uniform distribution and circulation of clean water. (14) Except as permitted in Sentence (19), all fittings at or below the water surface that allow water and/or air to be passed to or from the public pool shall (a) have a maximum opening of 7 mm in one direction, and (b) be securely held in place by corrosion resistance fastening that require a tool for removal and are galvanically compatible with the fittings and grilles or covers. (15) Except as provided in Sentence 3.11.6.1.(7) for a modified pool, all fittings below the water surface that provide suction or gravity flow in a public pool shall (a) be provided with a minimum of two suction or gravity outlets interconnected to a full size manifold, and (b) be separated by a clear distance of not less than 1 200 mm. (16) Except as provided in Sentence 3.11.6.1.(7) for a modified pool, water in all public pools shall be capable of being emptied through the pool drains in twelve hours or less. (17) Except as provided in Sentence 3.11.6.1.(7) for a modified pool, openings in suction or gravity fittings shall (a) be such that the flow of water does not exceed 0.45 m/s and the velocity is calculated assuming all possible sources of suction flow are present at one time, and (b) be such that every suction fitting located within 1 000 mm of the water surface, except for skimmers and gutter fittings, contain openings with a minimum aggregate area of 0.2 m2. (18) Except for skimmers and gutters, all submerged suction and gravity fittings shall be clearly and permanently marked with a 50 mm wide band in a contrasting colour. (19) Fittings returning water and/or air to the pool tank that are located within 300 mm of the water surface are permitted to have openings with one dimension more than 7 mm but shall contain no openings more than 25 mm in diameter. (20) Submerged skimmer equalizer fittings and vacuum fittings are not permitted in public pools. 3.11.9.Dressing Rooms, Locker Facilities, and Plumbing Facilities for all Public Pools