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It depends. Just as one shoe doesn't fit all sizes, neither does one pump fit all applications.

The purpose of this page is to present some recommendations for each pump type. Hopefully this will enable you to select the right pump for your application.

Gritton & Associates Recommendations

Inline Pumps

Series 60, 80, 80-SC & 90
Recommended Flow Range: 0 - 500 gpm, limiting horsepower to 10hp.
	Inline pumps are great for lower flow applications because they can be mounted directly in straight runs of pipe. This eliminates the need for a suction diffuser and saves valuable floor space in the mechanical room. On higher flow applications the physical size and weight of the motor becomes a factor. When motor horsepower exceeds 10hp, serviceability on a elevated pump is extremely difficult.
Utililizing a split-coupled (SC) type construction will allow seal replacement without removing the motor. Other maintenance procedures, such as impeller service, still require motor removal Standard installation practices for larger horsepower inline pumps would include floor mounting or lowering the pump to a serviceable height in a "U" design. In this configuration a suction diffuser or 10 pipe diameters of straight horizontal pipe must be installed before the pump. Large vertical inline pumps are particularly vulnerable to seismic forces. Vertical pumps have a high center of gravity relative to the pump flanges, this causes a high degree of torsional force on the connection between the flanges and pipe when lateral seismic forces occur. To decrease the force on the flanges, it is recommended that the pump be rigidly mounted and seismically braced.

End Suction Pumps

Base Mounted: Series 1510 & Close Coupled: Series 1531 The big difference between these pumps is maintenance and repair time. The close coupled pump requires less time on initial startup and less routine maintenance. The disadvantage is that they are more difficult to repair seals and impellers. The base mounted pump requires more time on initial startup and more routine maintenance. The advantage is that they are much easier to repair seals and impellers.
	Series 1510 Recommended Flow Range Series 1510: 20-3,500 gpm This type of unit utilizes a flexible coupling to connect the motor to the pump end. The flexible coupling reduces noise and motor vibrations in the system. The flexible coupling requires the motor and pump assembly to be aligned before the pump is started. By using a spacer type coupling (standard on B&G pumps) the assembly is configured to be a true back pull-out type pump. A true back pull out design will allow access to the seal and impeller without disturbing alignment of the pump motor assembly and the system piping resulting in less service time an easier component handling.
	Series 1531 Recommended Flow Range Series 1531: 20-2,000 gpm The pump impeller is bolted directly to the motor shaft eliminating the bearing assembly and flexible coupler. Eliminating alignment when pump is installed. The close coupled pump has a smaller footprint than the base mounted pump.