1-1/2" Cast Iron Flange

The Taco 110-254F Circulator Flange provides a secure, heavy-duty connection for hydronic and heating circulator pumps with 1-1/2 inch NPT pipe fittings.

The Taco 110-254F Cast Iron Circulator Flange is designed for use with Taco hydronic heating circulator pumps, providing a strong and leak-free connection to threaded piping systems. Built from durable cast iron, this flange ensures long service life and compatibility with high-temperature, high-pressure closed-loop systems. Ideal for both residential and commercial hydronic heating applications, it simplifies installation and maintenance while ensuring consistent, reliable performance.

• Model number 110-254F identifies the Taco Cast Iron Circulator Pump Flange with 1-1/2-inch NPT pipe connections.
• Designed for use with Taco hydronic circulator pumps and other compatible heating systems.
• Provides a secure, threaded connection between the pump and system piping.

Technical Data & Performance

• Product Type: Circulator Pump Flange.
• Brand: Taco.
• Material: Cast Iron – rugged and corrosion-resistant for extended service in closed-loop hydronic systems.
• Pipe Connection Size: 1-1/2 inch NPT (Female Threaded).
• Connection Type: Threaded – standard National Pipe Thread (NPT) connection for easy integration.
• Compatibility: Designed for Taco 00 Series circulator pumps and other models requiring 1-1/2-inch flanges.
• Dimensions (Approximate):
  • Height: ~3 inches.
  • Width: ~5 inches.
  • Thickness: 3/8 inch.
• Pressure Rating: 125 psi (862 kPa) maximum working pressure.
• Temperature Rating: Up to 240°F (115°C) operating temperature.
• Mounting Type: Flanged bolt-on connection for circulator pump installation.
• Surface Finish: Machined cast iron with a protective black coating to resist oxidation.
• Function: Connects pump to system piping while maintaining leak-free sealing under pressure.
• Installation: Surface-mounted using included bolts and gaskets (when applicable).
• Corrosion Resistance: Designed for closed hydronic systems to minimize oxygen-induced corrosion.
• Application: Ideal for hydronic heating, chilled water, and domestic hot water recirculation systems.
• Compliance: Meets ASTM A48 Class 30B standards for cast iron and ANSI B1.20.1 for threaded connections.
• Compatibility Notes: Use with Taco Freedom Flange® kits for simplified installation and maintenance.
• Maintenance: Low-maintenance; inspect periodically for thread wear or gasket condition.
• Weight: Compact and easy to handle during installation.
• Packaging: Supplied as a pair of flanges (typically) with mounting hardware (depending on kit configuration).
• Warranty: Backed by Taco’s Limited Manufacturer’s Warranty for material and workmanship quality.

Applications & Benefits

• Provides a robust connection between circulator pumps and threaded piping.
• Ensures leak-free performance in high-pressure hydronic systems.
• Compatible with Taco circulators and other common hydronic pump brands.
• Cast iron body offers long service life and resistance to heat, vibration, and mechanical stress.
• Simplifies installation, removal, and maintenance of circulator pumps.