1-1/2" Universal Hydronic Flo-Chek Valve

Taco 222-6 Universal Cast Iron Flo-Chek Valve – Professional Technical Information

The Taco 222-6 Universal Flo-Chek Valve is a professional-grade hydronic control component engineered to prevent unwanted gravity circulation in hot water heating systems. Built from durable cast iron, this valve maintains system integrity during non-demand periods, allowing the boiler to stay active for domestic hot water use while isolating inactive heating zones. Designed for both water and glycol-based systems, the 222-6 features an automatic actuator with a manual override option for gravity feed operation, providing reliable flow control and versatility across multi-zone hydronic systems.

Technical Specifications

• Manufacturer: Taco Comfort Solutions
• Model Number: 222-6
• Product Type: Hydronic Flo-Chek Valve
• Valve Type: Universal – Angle/Straight Configuration
• Nominal Size: 1-1/2 inch
• Connection Type: NPT Female Threaded
• Body Material: Cast Iron
• Media Compatibility: Hot water and water/glycol solutions
• Actuation: Automatic actuator with manual bypass screw
• Maximum Operating Pressure: 125 PSI (862 kPa)
• Maximum Operating Temperature: 277°F (136°C)
• Mounting Orientation: Horizontal
• Dimensions: 6 inch Width x 6-13/32 inch Height
• Seal Type: High-temperature elastomer
• Flow Direction: Clearly indicated by cast arrow on body
• System Application: Forced hot water and multi-zone hydronic systems
• Bypass Function: Manual opening for gravity circulation in the event of circulator failure
• Maintenance: Field-serviceable with minimal disassembly
• Finish: Industrial-grade protective coating for corrosion resistance

Performance and Application Features

• Prevents unwanted gravity circulation in hydronic systems when the heating zone is inactive.
• Allows boilers to operate continuously for domestic hot water without heat migration to inactive zones.
• Supports multi-zone systems, permitting heat transfer only to zones with active circulators.
• Manual thumb-screw enables gravity flow operation during power or circulator failure conditions.
• Automatic actuator ensures dependable operation without external controls or sensors.
• Constructed from high-strength cast iron for extended service life under high temperature and pressure.
• Threaded NPT ends simplify installation and integration into existing piping configurations.
• Compatible with hydronic fluids containing water or glycol mixtures for freeze protection applications.
• Compact form factor allows installation in confined mechanical spaces without performance compromise.
• Engineered for long-term, maintenance-free operation in commercial and residential hydronic heating systems.

Professional Summary

The Taco 222-6 Universal Cast Iron Flo-Chek Valve is designed to deliver consistent hydronic system performance and prevent unwanted heat transfer during idle operation. Its cast iron body construction, automatic actuator, and manual bypass capability make it a reliable component for controlled circulation in water or glycol-based heating systems. Engineered for professional use in multi-zone installations, the 222-6 provides precise flow control, operational flexibility, and high endurance under elevated system pressures and temperatures. It remains a preferred choice for contractors seeking long-term reliability and efficient thermal management in hydronic heating systems.