Series NBF bronze body pumps are dependable, in-line wet rotor circulator pumps specifically intended to pump potable, domestic water from hot water heater tanks to areas such as bathrooms and kitchens. The Series NRF features a maintenance-free system, with a self-cleaning particle shield protects the shaft and bearings from system start-up debris. The unique DuraGlide bearing system also contributes to trouble-free start-ups. A powerful, three-speed Red Fox motor offers high starting torque, ensuring consistent start-up season after season. The Series NBF's stabilized heat-resistant, non-metallic impeller with a closed design improves overall operating efficiency. Mounting hardware and flange gaskets are included with the pump. Flanges are available separately in 3/4", 1", 1-1/4", and 1-1/2".