Resideo VCZAL3400 Valve 30067439-890 making it a reliable choice

making it a reliable choice for commercial boiler systems and water heater applications

it provides a high-limit shutdown of the HVAC equipment and typically requires a manual reset at the unit or the remote test station to resume normal operation

a furnace limit switch trips due to restricted airflow caused by a dirty filter

As a veteran-preferred refrigeration pressure control

it ensures a drop-in installation for technicians addressing HVAC blower motor failure

Resideo VCZAL3400 Valve 30067439-890 making it a reliable choiceThe Resideo VCZAL3400 Valve is a professional grade 3 4 inch NPT 2 way cartridge cage valve designed for precision in modern hydronic systems. Engineered for high performance zone control, this bronze body valve handles both chilled and hot water applications, including high concentration glycol solutions up to 60%. With a 3. 9 Cv rating and an equal percentage flow characteristic, it ensures linear control when paired with proportional non fail safe