Durability: Engineered for high-temperature resilience in 90%+ AFUE furnace applications

Standard Pipe Sizing: Features 1/2" NPT inlet and outlet ports for compatibility with standard black iron gas lines common in HVACR installations

maintaining original equipment efficiency

Always verify the part number in your unit’s service manual before installation

Maxitrol M611-1 Valve THPU32HP7Y Durability: Engineered for high-temperature resilienceThe Maxitrol M611 1 Valve is a high precision 1" NPT modulating gas valve engineered specifically for direct fired burners operating in negative pressure (pull through) environments. As a veteran technician, you know that managing combustion in makeup air systems and industrial ovens requires stable, non oscillating control. This Maxitrol Selectra valve utilizes a specialized counter spring design to ensure the valve remains closed against the