NAC444.494. Skimmers.

     1. When surface skimmers are used as the sole overflow system, at least one surface skimmer must be provided for each 100 square feet (9.03 square meters), or fraction thereof, of the surface area of the water. When two or more skimmers are used in a spa, they must be located to maintain effective skimming action over the entire surface area of the water.

     2. The total capacity of all skimmers must be at least two-thirds of the required recirculation flow.

     3. In outdoor spas, one skimmer must be placed at a point away from the direction from which prevailing winds blow, if the surface area of the water is greater than 100 square feet (9.03 square meters).

     4. Skimmers must comply with all applicable requirements of NSF International Standard 50 or, in the absence of any current or applicable standards, be approved by the health authority.

     5. All skimming devices must be equipped with an approved equalizer valve and equalizer line with an inside diameter of at least 2 inches (5.08 centimeters) installed at least 12 inches (30.48 centimeters) below the normal operating level of the water. The inlet to the equalizer line or lines must be designed to prevent the creation of a holding force whenever the body or limb of a bather comes into direct contact with the inlet. The inlet must be protected by a grill or shroud that will prevent a bather or any limb of a bather from entering the inlet.

     [Bd. of Health, Public Spa Reg. Art. 20 §§ 20.3-20.5, eff. 11-27-79]—(NAC A 11-2-88; 1-16-96)