Lennox 17F09 Collector Box 323055-751 it features a 1/4" NPT

it features a 1/4" NPT process connection and a 1/8" NPT vent port

a compromised blower wheel is a likely culprit

designed to remain in the circuit while the motor is operational to maintain torque and efficiency

ensuring the combustion circuit remains pressurized and clear of HVAC system leaks

OEM Compatibility: Specifically designed to replace obsolete or failing HH19ZA450

Lennox 17F09 Collector Box 323055-751 it features a 1/4" NPTThe Lennox 17F09 Collector Box, also identified as the Lennox 619598 16 Cold End Header Box Kit, is a critical OEM component engineered for high efficiency condensing furnace repair. Designed specifically for the Lennox ML195 series and EL195DF furnace models, this collector box serves as the primary junction for managing furnace condensate drainage. It effectively captures flue gases and directs acidic condensation into the condensate trap,