Replacement Gas Valve

The Taco ZVC-406-EXP is a professional-grade six-zone valve control system designed for hydronic heating applications requiring flexible zoning management. This replacement ball valve assembly features 3/4 inch NPT brass construction, delivering reliable performance in commercial and residential heating systems. Operating on 120 VAC +/-10%, 60 Hz input with 24 VAC transformer output, this control delivers up to 80 VA maximum output to manage zone valve operations efficiently. The system accommodates 2, 3, or 4-wire zone valve configurations, ensuring broad compatibility across existing installations. With switchable priority zoning functionality, the ZVC-406-EXP controls up to six zones directly while offering expansion capability to twenty total zones through daisy-chained master/slave configurations. The priority operation feature enables Zone 6 designation to override all other zones when activated, ensuring critical heating zones receive demand precedence until satisfied. Housed in a compact 113/4 inch width, 71/2 inch height, 3 inch depth enclosure, this control integrates seamlessly into mechanical rooms and equipment spaces. The unit's switchable mode operation and flexible zoning capacity make it ideal for multi-zone hydronic systems requiring sophisticated temperature management across diverse building areas. Engineered for durability and consistent performance in demanding HVAC environments, the Taco ZVC-406-EXP replacement valve provides system designers and technicians a dependable solution for complex heating system control requirements.