1" Air Scoop, Cast Iron

Taco 431-6 Air Scoop – 1" Cast Iron, Hydronic Air Separator

The Taco 431-6 Air Scoop is a precision-engineered hydronic component designed to efficiently separate entrained air from circulating water in closed-loop heating, cooling, or combination systems. Its enlarged chamber and internal baffle configuration reduce water velocity to promote effective air disengagement, ensuring quiet operation and long-term system stability. Constructed from one-piece cast iron, the 431-6 provides a durable, maintenance-free solution for air elimination and integration with either plain steel or diaphragm expansion tanks.

Technical Specifications

• Manufacturer: Taco Comfort Solutions
• Model Number: 431-6
• Product Type: Hydronic Air Scoop / Air Separator
• Connection Size: 1 inch NPT
• Material: Cast Iron (one-piece body construction)
• Maximum Operating Pressure: 125 PSI
• Maximum Operating Temperature: 300°F (149°C)
• Design Features: Enlarged chamber with engineered internal baffle for air separation
• Mounting Configuration: Horizontal installation on system supply line
• Tank Connection: Tapped outlet provided for plain steel or diaphragm-type expansion tanks
• Flow Function: Slows system velocity to allow entrained air to rise and vent via automatic air vent (sold separately)
• Maintenance Requirements: None – static baffle design requires no service
• Applications: Hydronic heating systems, chilled water systems, and combination systems
• Compliance: Meets standard hydronic system design requirements and ASME specifications for cast iron fittings

Performance and Application

The Taco 431-6 Air Scoop is designed to improve system efficiency and reduce operational noise by ensuring complete air removal from closed-loop hydronic circuits. The engineered baffle geometry separates air from the water stream as velocity decreases through the chamber, allowing for efficient venting at the top port connection. The cast iron body ensures high mechanical strength and thermal stability under elevated system temperatures and pressures. Its integral expansion tank connection offers a cost-effective means of combining air separation with tank installation, reducing field piping complexity and overall system footprint.

Summary

The Taco 431-6 1" Cast Iron Air Scoop provides a durable, maintenance-free air elimination solution for professional hydronic system installations. Its enlarged chamber and internal baffle design enhance air separation efficiency, while its one-piece cast construction and integrated tank connection deliver long-term reliability for heating, cooling, and mixed-system applications.