The basic parallel pumping installation is illustrated in Figure 1. In most cases, parallel or series pumping can provide 70 to 90 percent of system capacity with no increased cost! In some cases, this may be essential, but on many installations, the cost of providing full standby capacity is prohibitive. Often a designer will specify two pumps, each one capable of handling the entire load. The installed cost of two low-cost stock in-line pumps will be less than the installed cost of one large base-mounted pump, and can provide standby protection at no extra cost. Equipment room floor space can be utilized for something else. Using circulating pumps in parallel or series configurations can attain many economic and operational gains as opposed to using one large pump to supply a system’s pumping requirements.Įmploying a combination of in-line pumps rather than base-mounted pumps to accomplish a pumping requirement eliminates the need for pump mounting pads, grouting, and shaft alignment.
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