- (a) All small CWSs shall comply with this section relative to booster pumps, which withdraw water from atmospheric storage tanks and are designed to maintain system pressure by pumping to hydropneumatic or pressure tanks or by using pressure reducing valves or variable frequency drives.
- (b) Where booster pumps are used, total booster pump capacity shall be at least equal to peak flow with the largest booster pump out of service.
- (c) Booster pumps shall be connected to a flat, secure, and durable surface of sufficient strength to withstand vibration, thrust, and weight. The installed elevation of the pump base shall be at least 8 inches above the finished floor in the pumphouse.
- (d) Pumps shall be selected such that they operate near their best efficiency point during normal operations.
- (e) Pump configuration shall account for anticipated variations in flow rate. Where practicable, multiple pumps, pumps of different sizes, for example jockey pumps, or both shall be used to optimize the efficiency of the pumping station electrical use.
- (f) All pump motors shall be premium efficiency motors as defined by the National Electrical Manufacturers’ Association ANSI/NEMA Standard MG-1-2021, “Motors and Generators”, 2021, available in Appendix B.
Source. (See Revision Note at part heading for Env-Dw 405) #10612, eff 6-1-14; ss by #14158, eff 12-25-24 (formerly Env-Dw 405.20)