Resideo VCZAL3400 Valve 30067439-890 always ensure the laser-engraved arrow

always ensure the laser-engraved arrow on the body matches the direction of refrigerant flow during installation

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

Integration with HVAC tube cleaning equipment is seamless

Whether you are performing a seasonal tune-up or converting gas types

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

Resideo VCZAL3400 Valve 30067439-890 always ensure the laser-engraved arrowThe 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