NAC444.477. Inlets.

     1. Spa inlets must be:

     (a) Rounded.

     (b) Smooth.

     (c) Installed at least 18 inches (46 centimeters) below the normal operating water level. An exception to this requirement may be granted by the health authority if the shallow depth of the pool or spa prevents the inlets from being installed at that depth.

     (d) Located to produce a uniform circulation, without the existence of dead spots.

     2. Spa inlets must not extend from the pool wall or floor.

     3. Each set of stairs must have an inlet positioned to provide good circulation over the stairs.

     4. If wall inlets are used, the spacing between adjacent inlets must not exceed 15 feet. The spacing may be varied if the number of inlets is not reduced below a number equal to one-fifteenth of the pool’s perimeter in feet.

     5. Any spa having a width greater than 30 feet (9 meters) must have floor inlets located to provide general circulation and not direct flow to floor drains. If floor inlets are used, the spacing between adjacent inlets must not exceed 15 feet and the spacing between inlets and the adjacent wall must not exceed 10 feet (3.04 meters).

     6. A combination of wall and floor inlets may be used if the design can be shown to produce a uniform circulation of water to maintain a uniform residual of disinfectant throughout the spa.

     7. Spas greater than 30 feet (9.14 meters) in width must have floor inlets which comply with the spacing requirements of subsection 5 or with a combination of wall and floor inlets which comply with the spacing requirements of subsections 4 and 5.

     (Added to NAC by Bd. of Health, eff. 11-2-88)