1-1/2" Air Scoop, Cast Iron

Taco 433-5 Air Scoop – 1-1/2" Cast Iron, Hydronic Air Separator

The Taco 433-5 Air Scoop is a heavy-duty hydronic air separator engineered to eliminate entrained air from closed-loop heating, cooling, and combination systems. Featuring an enlarged chamber and precision-engineered internal baffle design, the unit slows water velocity to promote efficient air removal, ensuring stable, quiet, and air-free system operation. Its one-piece cast iron body provides strength, durability, and long service life without the need for maintenance. The integrated expansion tank connection allows for economical system configuration and effective air elimination in a wide range of hydronic applications.

Technical Specifications

• Manufacturer: Taco Comfort Solutions
• Model Number: 433-5
• Product Type: Hydronic Air Scoop / Air Separator
• Connection Size: 1-1/2 inch NPT
• Material: One-piece Cast Iron Construction
• Maximum Operating Pressure: 125 PSI
• Maximum Operating Temperature: 300°F (149°C)
• Design Features: Enlarged body and internal baffle to promote efficient air separation
• Mounting Orientation: Horizontal installation on the system supply line
• Tank Connection: Integral port for connection to plain steel or diaphragm-style expansion tank
• Air Vent Port: Top tapping provided for installation of automatic or manual air vent (vent sold separately)
• Flow Function: Reduces system velocity, allowing air to rise and be vented from the system
• Maintenance: None required – static, non-mechanical design
• Applications: Hydronic heating systems, chilled water loops, and combination hydronic systems
• Construction Standards: Meets ASME and hydronic system design specifications for cast iron fittings

Performance and Application

The Taco 433-5 Air Scoop is engineered for efficient air separation in professional hydronic system installations. The enlarged cast iron chamber and internal baffle create a controlled flow zone that allows entrained air to separate from the circulating water, enhancing system performance and longevity. The air is released through a connected vent, while the expansion tank port allows for simplified integration of air elimination and pressure control components. Designed for durability and quiet operation, the 433-5 is ideal for use in both commercial and residential hydronic systems where air-free circulation is essential for proper heat transfer and noise reduction.

Summary

The Taco 433-5 1-1/2" Cast Iron Air Scoop provides a reliable, maintenance-free air elimination solution for professional hydronic heating and cooling systems. Its precision baffle design, integral expansion tank connection, and robust cast iron construction ensure efficient air separation and long-term system performance in demanding mechanical environments.