NAC444.170. Filters.

     1. Any filter used in a pool must be designated by the NSF International as complying with all applicable requirements of Standard 50, “Circulation System Components and Related Materials for Swimming Pools, Spas/Hot Tubs,” of the NSF International or in the absence of applicable requirements, be approved by the health authority. A copy of this standard may be obtained from the NSF International, P.O. Box 130140, Ann Arbor, Michigan 48113, at a cost of $45. Flow rates for filters must not exceed those listed by the NSF International Standard.

     2. The filter plant must be provided with influent pressure gauge.

     3. The filter plant must be provided with a means for draining all filter units and piping, so that all parts of the system may be drained to prevent damage from freezing where so required.

     [Bd. of Health, Public Bathing Places Reg. Art. 27, eff. 5-21-74]—(NAC A 7-23-82; 11-1-88; 1-16-96)