Lennox X7784 is a factory-approved bi-flow filter drier manufactured by DiversiTech, model DBF164S. This liquid line drier is designed specifically for heat pump and reversible refrigerant flow systems, providing reliable filtration and moisture removal in both heating and cooling modes. With a 16 cubic inch desiccant capacity and 1/2 inch ODF solder connections, it supports systems up to 3.5 tons while helping protect compressors, expansion devices, and valves from contaminants and acid formation.

The bi-flow design allows unrestricted refrigerant flow in either direction, making it ideal for modern heat pump applications where system flow reverses seasonally. The sealed steel construction ensures durability, while the high-capacity desiccant core effectively removes moisture to extend system life and maintain peak efficiency. This component is commonly used in Lennox residential and light commercial HVAC systems as an OEM-specified replacement.

 

Product overview:

This bi-flow filter drier is used in heat pump liquid lines to capture moisture, acids, and solid contaminants during normal operation and after system service. It is suitable for use with standard HVAC refrigerants when installed per manufacturer guidelines.

 

Specifications:

Manufacturer: DiversiTech
OEM reference: Lennox X7784
Model: DBF164S
Type: Bi-Flow Filter Drier
Desiccant volume: 16 cubic inches
Connection size: 1/2 inch ODF solder
System capacity: Up to 3.5 tons
Application: Heat pumps and reversible flow systems