The Bell & Gossett 103401LF (Model NBF-36) is a 3-speed bronze wet-rotor circulator pump engineered for potable domestic water systems and hydronic heating or cooling. Powered by a 1/6 HP motor operating at 115V AC (60 Hz, single phase), it delivers a max flow rate of 36 GPM and up to 34 feet of head. Its lead-free bronze casing and DuraGlide bearing system ensure quiet, efficient operation across three selectable speed settings.
This pump was fully removed from its original box for visual inspection. The housing, motor enclosure, and flanged connections appear clean and free of cosmetic or structural damage. Internal rotation was confirmed, but the unit has not been wired or fluid tested. Please refer to the photos for more information.
This unit only includes what is photographed in the listing.
Technical Specs
| Item | Circulating Pump |
| Series | NBF-36 |
| Manufacturer Part Number | 103401LF |
| Number of Speeds | 3 |
| HP | 1/6 hp |
| Maximum RPM | 3,300 RPM |
| Nameplate Voltage | 115V AC |
| Frequency | 60 Hz |
| Full Load Current | 2.3 A |
| Phase | Single |
| Casing Material | Bronze |
| Impeller Material | Plastic |
| Max. Flow Rate | 36 gpm |
| Maximum Flow Rate @ 5 feet of Head | 33 gpm |
| Maximum Flow Rate @ 10 feet of Head | 28 gpm |
| Maximum Flow Rate @ 15 feet of Head | 24 gpm |
| Flow @ 20' of Head | 17 gpm |
| Maximum Flow Rate @ 25 Feet of Head | 13 gpm |
| Maximum Flow Rate @ 30 Feet of Head | 6 gpm |
| Maximum Feet of Head | 34 ft |
| Max. Operating Pressure | 150 psi |
| Minimum Media Temperature | 14 °F |
| Max. Media Temp. | 225 °F |
| Mounting Location | Inline |
| Rotor Type | Wet |
| Motor Enclosure Design | Totally Enclosed Non-Ventilated |
| Compatible Pipe Size | 3/4 in 1 in 1-1/4 in 1-1/2 in |
| Compatible Discharge Pipe Size | 3/4 in; 1 in; 1-1/4 in; 1-1/2 in |
| Connection Type | Flange |
| Includes Flange | No Flange Included |
| System Type | Potable Water |
| Face to Face Dimension | 6-3/8 in |
| Overall Length | 6.88 in |
| Overall Width | 5.75 in |
| Overall Height | 6.38 in |
| Circulator Pump Media Type | Potable Water Pump |