Bell & Gossett Series 1531 Model 312T Cast Iron Close-Coupled End-Suction Booster Pump with 0.25 HP Motor

The Bell & Gossett Series 1531 Model 312T is a robust, close-coupled end-suction centrifugal pump designed for booster applications in HVAC systems, water circulation, and general industrial fluid transfer. Constructed from durable cast iron with bronze fittings, this pump offers excellent corrosion resistance and longevity in demanding environments. It features a 0.25 HP three-phase motor operating at 1725 RPM, providing efficient performance for low-flow, low-head applications. Key benefits include its compact design, which saves space compared to base-mounted alternatives like the Series 1510, easy maintenance with back pull-out construction, and reliable operation under pressures up to 175 PSI. Advantages over similar products, such as those from Grundfos or Armstrong, include superior build quality from a trusted manufacturer, quieter operation, and compatibility with hot water systems up to 225°F. Drawbacks may include higher initial cost and the need for three-phase power, limiting residential use. This unit is ideal for commercial building booster systems, irrigation, and process cooling, delivering flow rates up to approximately 50 GPM and heads up to 20 feet, based on typical Series 1531 performance curves. From attached images, the pump appears used with minor paint wear but no visible damage, suggesting good refurbishable condition.