R309-540-6. Pumps

(1) A pump used to provide minimum distribution system pressure shall: (a) have the capacity to meet the maximum demand of the specific portion of the distribution system served; and (b) be capable of providing the minimum pressure requirements of Section R309-105-9. (2) If a pump station is the only means available for a community PWS to meet the minimum distribution system pressure requirements of Section R309-105-9, the pump station shall have at least two pumps in operation. (a) Transient and non-transient non-community PWSs shall have at least one pump in operation to maintain the minimum distribution system pressure requirements of Section R309-105-9. If the director finds that unplanned closures could cause harm to public health, the director may require a transient or non-transient non-community PWSs to install at least two pumps to maintain minimum distribution pressure. (b) Transient and non-transient non-community PWSs that have only one pump in operation shall have a backup pump available that is ready to install if necessary. (3) In a pump station that requires at least two pumps, if the largest pump is out of service, the second pump shall have the capacity to meet the maximum demand of the water distribution pipeline served by the pump station. (4) Each booster pump: (a) shall have an automatic shutoff or low-pressure controller as recommended by the pump manufacturer; (b) that withdraws water from a distribution line shall maintain an intake pressure of at least 20 psi when the pump is in normal operation; (c) that withdraws water directly from a water storage tank shall have net positive suction head. (5) A pump motor shall: (a) have the capacity to meet operating conditions without overloading; and (b) provide the maximum horsepower necessary to run the pump without the use of a service factor. (6) Any material that may come in contact with drinking water in a pump facility shall be certified to meet NSF/ANSI 61. (7) Any pump with suction lift shall: (a) be within the pump manufacturer's recommended limits; and (b) have priming for the pump. (8) When a pump requires priming, the priming system shall: (a) use water of at least the same quality that the pump is pumping; and (b) include a means to prevent back siphoning. (9) For vacuum priming that uses an air-operated ejector, the ejector shall draw clean air through a screened intake that is: (a) at least ten feet above the ground; and (b) at least ten feet away from a point of contamination. (10) A pump that uses water for a seal shall have water of at least the same quality that the pump is pumping. A water line supplying drinking water for a seal for a pump that pumps non-potable water shall have backflow protection. (11) A booster pump within the premise plumbing of a building or on the service lateral connection, including a home booster pump, is acceptable if:(a) the pump is not necessary to resolve deficiencies related to the necessary minimum pressures at the point of connection for the service lateral per Section R309-105-9; (b) the PWS approves the pump installation; and (c) the pump installation and operation meet the applicable requirements in the International Plumbing Code and any amendments that the Department of Commerce has adopted.