it can be field-converted to Power-Open/Spring-Close by adjusting the motor coupling position

The 1/2" NPT (National Pipe Thread) is a North American standard for tapered threads used to create a liquid-tight seal

25" precision-molded design ensures maximum flow efficiency and reduced turbulence

Combustion Efficiency: Prevents excess air from entering the combustion chamber

Enhanced Durability: The lightweight

Resideo V4043A1317 Zone Valve 340793-762 it can be field-converted toThe Resideo V4043A1317 is a heavy duty 120Vac hydronic zone valve engineered for precise flow control in closed loop heating and cooling systems. Featuring a 1 inch sweat connection and a robust brass body, this normally closed zone valve utilizes a spring return mechanism to ensure fail safe operation during power loss. With an 8 Cv flow coefficient and a 8 PSI maximum close off pressure, it handles high demand residential and light commercial