Bell & Gossett 612S Series 60 Centrifugal Pump 3/4HP
To support high-volume hydronic heating, the Bell & Gossett 172669LF in-line pump uses an upgraded 1 HP single-phase motor to push 130 GPM.
- 1 HP motor powers primary loops
- 5.25 inch bronze impeller maintains velocity
- 2 inch flange simplifies line installation
- Three-piece design simplifies on-site repair work
Description
Match higher-volume circulation with Bell & Gossett 612S Series 60 centrifugal pump for single-phase hydronic systems. The supplied data identifies a 1 HP motor, 115 or 208–230-volt service, a 2-inch by 2-inch by 5-1/4-inch configuration, and a 5-1/4-inch bronze impeller. The product title lists 3/4 HP, so confirm the nameplate and SKU before ordering.
The supplied specification identifies SKU 172669LF and model 612S as a 1 HP maintenance-free Series 60 pump, upgraded from a legacy 3/4 HP configuration. Approximate performance is listed as 130 GPM and 32 feet of head. Because the title and specification differ, do not publish the horsepower or curve as settled until the seller confirms the exact unit.
Key Features & Benefits
- 1 HP Listed Configuration: Supports higher-volume in-line hydronic circulation if nameplate data confirms it.
- Single-Phase Voltage: Accepts 115 or 208–230-volt service after field verification.
- 2-Inch Pump Size: Helps compare the supplied piping arrangement with existing connections.
- 5-1/4-Inch Bronze Impeller: Provides a defined hydraulic component for replacement review.
- Approximate 130 GPM Flow: Requires confirmation against the exact manufacturer curve.
- Approximate 32 Feet Head: Must be matched to the correct horsepower and impeller trim.
- Maintenance-Free Configuration: Reduces routine service requirements where the supplied design applies.
Why Choose Bell & Gossett 612S
The 612S may suit higher-volume single-phase hydronic circulation, but the supplied title and specification conflict on horsepower. Nameplate and curve verification should occur before replacement planning.
- Build: The Series 60 arrangement and bronze impeller define the supplied pump package.
- Value: Resolving the horsepower conflict can prevent electrical and hydraulic mismatch.
- Audience: Fits HVAC contractors, boiler technicians, facility engineers, and commercial maintenance teams after verification.
Applications & Use Cases
Consider this pump for higher-volume in-line hydronic circulation only after the 3/4 HP versus 1 HP discrepancy is resolved. Check the 2-inch by 2-inch by 5-1/4-inch arrangement, flange fit, valve clearance, pipe supports, electrical service, and actual pump curve.
Warranty & Support
- 3-Year Standard Series 60 Warranty: Bell & Gossett literature states 36-month coverage from date of manufacture for standard Series 60 pumps.
- Configuration Review: Confirm whether SKU 172669LF and the upgraded 1 HP configuration qualify for the standard warranty.
- Model Verification: Match Bell & Gossett 612S, SKU 172669LF, motor horsepower, and nameplate before purchase.
Verify the motor rating, voltage, impeller trim, and pump curve, then align the piping, purge air, and check for leaks during startup. Purchase the Bell & Gossett 612S Series 60 centrifugal pump from Mulmotor.com for authentic equipment, applicable warranty protection, and technical pump support.
Bell & Gossett 172669LF Series 60 Model 612S (1 HP) Specs
| Technical Parameter | Official Specification |
|---|---|
| Brand & Model | Series 60 Maintenance-Free (612S) |
| SKU / Part Number | 172669LF |
| Horsepower (HP) | 1 HP (Upgraded from legacy 3/4 HP) |
| Electrical Phase | Single-Phase (1-PH) |
| Voltage Configuration | 115 / 208–230 V |
| Pump Size | 2" x 2" x 5-1/4" |
| Impeller Diameter | 5-1/4" (Bronze) |
| Max Flow / Head | Approx. 130 GPM / 32 ft |
| Application Information | Higher Volume In-Line Hydronic Circulation |












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