Bell & Gossett 103260LF 1/40 HP NBF-12F/LW Bronze Circulator Pump (Lead Free)
A lead-free bronze wet-rotor circulator pump used to move water in hydronic/heating and open-loop hot-water recirculation applications where the specified Bell & Gossett NBF pump is required.
Key Features
- 115V, 1/40 HP circulator pump
- Flanged x flanged connection
- Performance listings: 17 max GPM, 12 ft max head
- 150 max PSI; 230°F max temperature
- Bronze construction; listed as lead free
- Xylem describes NBF wet-rotor pumps as in-line circulators designed for open (potable) water systems with 100% lead-free bronze bodies, available in flanged/union/sweat models, and suitable for residential or light commercial potable or heating applications.
Compatibility & Applications
- Listed for heating applications; commonly used for hot-water circulation where a small in-line wet-rotor circulator is specified.
- This model is listed as replacing 103260.
- Must only be used where the manufacturer specifies this exact part number: 103260LF.
Installation & Operation Notes
- Installation should be performed by a qualified hydronic/HVAC technician.
- Reference the pump installation instructions and the system's service/installation manual for correct piping orientation, wiring, and startup/checkout.
- SupplyHouse lists a 3/4" stainless steel pump flange set (lead free) as a commonly paired item; select the correct flange/connection components per the piping configuration.
Maintenance & Troubleshooting
- Typical service drivers include loss of circulation (no/slow hot-water return, poor loop performance) or pump failure requiring replacement.
- If performance seems low after installation, verify system conditions (air removal, check valves, flow restrictions) per the system documentation
- Use the pump/system troubleshooting guidance to confirm the pump is the root cause before replacement.
User Reviews & Q&A Summary
- Restores hot water/recirculation: Reviews frequently mention replacing a failed recirculation pump and getting "hot water again."
- Straightforward install: Multiple reviewers describe installation taking under an hour and the pump working well immediately.
- Included parts: At least one reviewer notes it came with gaskets, which they did not expect.