675 IAC 20-2-19 Pumps

Sec. 19. (a) A pump and motor shall be provided for circulation of the pool water. Performance of all pumps shall meet or exceed the conditions of flow required for filtering and cleaning (if applicable) the filters against the total dynamic head developed by the complete system. (b) Water entering the pump or pumps shall pass through the removable strainer. (c) Pumps shall be selected to perform the functions for which they were intended. Pumps and motors must be accessible for inspection and service. (d) All motors shall have as a minimum an open, drip-proof enclosure and be constructed electrically and mechanically so they will perform satisfactorily under the conditions of load and environment normally encountered in swimming pool installations. (e) Motors shall be capable of operating the pump under full load with a voltage variation of at least five percent (5%) from nameplate rating. If the maximum service factor of the motor is exceeded (at full voltage), the manufacturer shall indicate this on the pump curve. (f) All motors shall have thermal or current overload protection, either built-in or in the line starter, to provide locked rotor and running protection. (g) The motor frame shall contain adequate provisions for proper grounding. When a pump is installed below the waterline of a pool, valves shall be installed on permanently connected suction and discharge lines, located in a place outside the walls of the pool, where they will be readily accessible for maintenance and removal of the pump. (h) Pressure and vacuum gauges shall be installed on all swimming pools and the: (1) vacuum gauge shall be installed as close to the pump suction inlet as possible and still maintain an accurate reading; and (2) pressure gauge shall be installed on the face piping ahead of the filter or on the top of the filter in the area of greatest filter pressure. (i) Where a mechanical pump seal is provided, components of the seal must be corrosion-resisting and capable of operating under conditions normally encountered in swimming pool operation. (j) Pumps shall be of sufficient capacity to provide a minimum backwash rate of fifteen (15) gallons per square foot of filter area per minute in sand filter system. Pumps shall be of sufficient capacity to supply the recirculation rate of flow at a total dynamic head of at least: (1) fifty (50) feet for vacuum filters; (2) seventy (70) feet for pressure sand or cartridge filters; and (3) eighty (80) feet for pressure diatomaceous earth filters. Pumps located at an elevation higher than the facility water line shall be self-priming.