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Read our privacy policyDesigned for R410A systems, the DIY50-3858 coupler links two precharged line sets to extend installation options, keeping older mini split units efficient with easy, DIY-friendly wall-mounted setups.
Pre-Charged for Easy Installation
This 50-foot line set comes pre-charged with R410A refrigerant, allowing installers to connect indoor air handlers to the outdoor condenser without additional charging. The pre-sealed design streamlines setup and ensures proper refrigerant flow.
Quick Connect System
Integrated quick connect fittings provide secure and leak-resistant connections between compatible MRCOOL DIY indoor and outdoor units, reducing installation complexity and time.
Durable Construction
Constructed with high-quality copper tubing and insulated lines, this line set ensures consistent performance and long-lasting durability in residential and light commercial installations.
The MRCOOL DIY Quick Connect Line Set is backed by the manufacturer’s warranty when installed with compatible MRCOOL DIY systems and used according to manufacturer guidelines.