Description
Product Description
Ensure the long-term performance of your refrigeration system by replacing the crucial filter-drier with the high-quality part TJ90SUD109 (also referenced as SUD109 or ERD109). This copper drier is designed to capture moisture and debris from the refrigerant line, protecting the compressor and expansion device from damage. It is used in many household and commercial refrigerator/freezer systems. According to listings, this part is “Supco OEM Part # TJ90SUD109 Copper Drier” and “Compatible With … Refrigerator/Freezer/Air Conditioner Spun Copper Filter-Drier with Yellow Dye.” repairpartsinc.com+1
Because refrigeration setups vary by refrigerant type, tubing size, connection style and model year, please check with your maintenance technician prior to ordering to ensure the drier matches your system specifications.
Features & Benefits
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High-quality copper construction: Built to withstand typical refrigeration conditions and help maintain system integrity. repairpartsinc.com+1
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OEM-equivalent performance: Matches specifications for part numbers SUD109, ERD109, KX3, MMS-80 among others. Amazon+1
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Enhanced system reliability: By removing moisture and particulate contamination, this drier supports proper refrigerant flow and helps prevent compressor failures and costly downtime.
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Cost-effective preventive part: Rather than risking major refrigeration component failure, replacing the drier is a relatively low-cost maintenance step.
Common Symptoms That Indicate Replacement Is Needed
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The refrigeration system shows unusually low cooling performance or high head-pressure while other components (compressor, condenser, fan) appear functional.
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The line to/from the drier or filter appears discoloured, corroded or visibly clogged (e.g., yellow dye indicating saturation).
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Moisture in the system led to ice formation in the filter or hopping during compressor start-up.
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System service history indicates contamination or refrigerant burn-out and the drier was not replaced at that time.
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The existing drier is missing, damaged, or has been bypassed.
Cross Reference / Alternate Numbers
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SUD109 / ERD109 — often listed as equivalent part numbers for TJ90SUD109. eBay
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MMS-80, KX3 — alternative labels used in some catalogs. Amazon
Always ensure the connection size, refrigerant type and capacity rating match your system before ordering.
Compatibility Notes
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Verify the inlet and outlet connection size and orientation (typically copper tube ends) match your system’s existing drier.
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Confirm the refrigerant type (R-134a, R-600a, etc) the system uses and whether the drier is rated accordingly.
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If the drier is being replaced due to a system component failure (compressor burnout, etc), ensure the system has been properly evacuated, filtered and vacuumed before installing the new drier.
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A new drier does not fix heat-load issues, undersized condenser, airflow problems or other root causes — have the technician inspect the entire refrigeration circuit.
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Because this is a critical component in the sealed refrigeration system, technician installation is strongly recommended.