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Bard part number 5201-010BX is an OEM bi directional heat pump filter drier with 3/8 inch ODF sweat connections, used in Bard wall mounted heat pump refrigerant circuits to help keep the sealed system clean and dry by capturing moisture, acids, and debris in either flow direction during heating and cooling. Replacing a restricted or contaminated drier can protect metering devices and the compressor, restore proper refrigerant flow, and support stable system operation after a repair or when the refrigerant circuit has been opened. Confirm fit by matching your unit model and service literature, and have installation performed by a qualified technician since this is a brazed in refrigerant line component.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.