NAC444.162. Pumps and motors.

     1. A pump and motor unit must be provided for the recirculation of water which has been selected for performance and will meet the conditions of quantity required for filtering and cleaning the filters with the total dynamic head developed by the complete system.

     2. The requirements for filtration must be based upon the maximum head loss developed immediately before washing the filters.

     3. The motor must be nonoverloading in continuous operation for filtration under all conditions, but may be overloaded within the service factor for conditions of backwash and for emptying any pool.

     4. A pump performance curve for the unit to be installed must be provided with the plans submitted for approval.

     5. A pump used in a recirculation system must:

     (a) Comply with all applicable requirements of Standard 50 of the National Sanitation Foundation. A copy of this standard may be obtained from the National Sanitation Foundation, P.O. Box 1468, Ann Arbor, Michigan 48106, at a cost of $8.

     (b) In the absence of an applicable standard, be approved by the health authority.

     [Bd. of Health, Public Bathing Places Reg. Art. 26 § 26.4, eff. 5-21-74]—(NAC A 11-1-88)