MRCOOL DIY 75ft (50 ft + 25 ft) 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor, 4th Generation, DIY75-3858C
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This 75 ft. copper line set is designed to connect the 4th Generation MRCOOL DIY Condenser to the MRCOOL DIY Air Handlers, specifically for the 24K and 36K models.
Included in this set is 50 ft. of communication wire. For customers purchasing additional air handlers along with the line set, each air handler is supplied with 25 ft. of communication wire to facilitate installation.
The product package contains the following components:
- MRCOOL DIY 50ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor, 4th Generation (Model: DIY50-3858C)
- MRCOOL 25ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor (Model: DIY25-3858)
- MRCOOL DIYCOUPLER-58 + DIYCOUPLER-38 + 75ft MC-5 Cable, 4th Gen (Model: DIYCOUPLER-3858K75C)
Please note that for Multi-Zone systems, a separate line set is required for each indoor unit to ensure optimal system functionality.
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Specifications and Dimensions
Equipment Type R-410A Charged Line Set Length 75 Feet Color Copper Line Set Fitting Type Quick-Connection Liquid Line Size 3/8 Suction Line Size 5/8 Contains Chemicals Yes Contains Aerosol Yes Contains Compressed Gas Yes Proposition 65 Warning Yes Restricted States GU;PR;VI -
Handling Line Sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Bending the Copper Lines: Maintain a minimum 4-inch bend radius and use smooth curves instead of sharp angles to protect the lines and ensure proper refrigerant flow.
Avoid Repeated Bending: Bending copper lines more than three times can harden and weaken them, increasing the risk of breakage. Handle with care and minimize adjustments.
For best results, use gradual bends and consult a licensed professional or our support team if needed.







