Series 100 NFI cast iron pumps are dependable, in-line booster pumps intended to pump water through closed loop systems for heating and cooling. The Series 100 features a three-piece design, which includes a motor, bearing assembly and volute. This innovative design provides for easy field service as the bearings, shaft and seal are all housed within the bearing assembly. That assembly can then be easily repaired or entirely replaced without disturbing the other components of your pump. The Series 100's resilient motor mounting is another feature unique to Bell & Gossett. The mounting, combined with spring-loaded couplers, means your pump will run quietly and efficiently. All Series 100 pumps have ODP, open drip-proof, motor enclosures. The Series 100 NFI features a plastic impeller. A tube of Bell & Gossett oil along with flange gaskets and mounting hardware are included with the pump. Flanges are available separately in 3/4", 1", 1-1/4", and 1-1/2".