Up for sale is a genuine Lennox thermal expansion valve (TXV) assembly, part numbers 614045-05 and catalog 13Y20. This is a factory OEM replacement for 4-ton R-410A systems, commonly used in Lennox outdoor condensing units and heat pumps to precisely meter refrigerant flow.

This kit appears brand new (never installed), still in the original box with all components intact: brass valve body, pre-bent copper lines, bulb, and hardware. Includes the full installation instructions sheet from Lennox.

Fits these Lennox units (4-ton models using R-410A):

This TXV is designed for various Lennox 4-ton heat pumps and air conditioners, particularly in outdoor units where the expansion valve is located. It is a direct replacement in many models, including but not limited to those cross-referenced with Allied, Armstrong, Concord, and Ducane brands (which share Lennox parts). Common applications include 4-ton systems requiring this specific 4-ton R-410A outdoor TXV assembly.

Examples of compatible systems (based on part cross-references; always verify with your model's manual or Lennox parts lookup):

Lennox 4-ton heat pumps and condensers (e.g., series using 4-ton capacity outdoor units)

Equivalent replacements in 4-ton R-410A equipment from Lennox family brands

Important Notes:

Professional HVAC installation recommended – improper installation can cause system damage, personal injury, or void warranties.

California Prop 65 warning present on box (standard for many HVAC brass components).