1" Cast Iron Circulator Flange

Reliable Connection for Circulator Installations – Taco 1" Cast Iron Flange Kit

The Taco Cast Iron Flange Kit is purpose-built for seamless integration with Taco 110 Series, 2400 Series, and all small 00e Series cast iron circulators. Designed for durability and precision, this flange ensures a secure connection point between the circulator and system piping. It’s a go-to solution for professional hydronic heating installations where quality and efficiency are non-negotiable.

Engineered for Demanding Hydronic Systems

This cast iron flange is machined for a precise fit, helping to maintain optimal flow and reduce turbulence at the connection point. Its 1" NPT thread and robust dimensions make it suitable for most residential and light commercial circulator pump installations. Whether you're servicing a retrofit or completing a new system build, this flange delivers dependable performance.

Product Benefits

• High-Strength Cast Iron Body – Durable construction handles mechanical stress and high-temperature hydronic environments.
• Secure 1" NPT Connection – Ensures a leak-resistant, stable fit to threaded piping systems.
• Complete with Hardware – Kit includes (4) bolts and (4) nuts for a straightforward, complete install.
• Compatible with Leading Taco Pumps – Fits Taco 110 Series, 2400 Series, and all small 00e circulators.
• Compact Profile – Streamlined size (4-1/8” wide x 2-3/4” tall) allows installation in tight mechanical rooms.

Technical Details

• Material: Cast Iron
• Inlet/Outlet Size: 1” NPT
• Kit Includes: Two flanges, four bolts, four nuts
• Use With: Taco 110, 2400, and small 00e Series cast iron circulator pumps

Installation Notes

Although the flange is designed for quick assembly, proper pipe preparation and thread sealing are essential for leak-free operation. Use thread compound or tape on all male connections and torque bolts evenly to prevent misalignment. For system pressurization, always confirm alignment before tightening the final fasteners.

Contractor Insight

This flange kit is built with jobsite realities in mind—easy to stock, simple to install, and reliable under pressure. It’s an ideal spare or replacement part to keep in the truck for circulator swaps or loop additions. When paired with Taco’s proven pump technology, it delivers the secure connection professionals expect on every job.