MRCOOL DIY Couplers with 75' MC5 Pro Cable Kit (DIYCOUPLER-1412K75C)
Extend your MRCOOL DIY Quick Connect line set while maintaining a protected, uninterrupted control wire connection.

The MRCOOL DIY Couplers with 75' MC5 Pro Cable Kit is designed for installations where a standard line set and standard control wire are not long enough. This kit allows you to connect two MRCOOL DIY Quick Connect line sets together while replacing the shorter factory control wire with a full-length 75' MC5 Pro Cable.

Unlike standard control wire, the MC5 Pro Cable features a metal-reinforced, shielded design that provides added protection for longer cable runs. This helps protect the communication and power connection between the indoor air handler and outdoor condenser, especially in installations where the wire may be routed through walls, attics, crawl spaces, garages, or other areas where extra durability matters.

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Why Choose the MC5 Pro Cable Version?

Metal-Reinforced Shielded Control Wire
The included 75' MC5 Pro Cable is built with a protective metal-reinforced shield, offering a more durable option than standard control wire. This added protection helps defend the cable against abrasion, routing damage, and general wear during longer installations.

Full-Length 75' Cable with No Splicing Required
This kit replaces the shorter factory control wire with one continuous 75' Pro Cable. That means there is no need to splice, extend, or modify the original cable. A continuous cable helps maintain a cleaner, more reliable connection between the indoor and outdoor units.

Designed for Extended MRCOOL DIY Line Set Installations
The included DIYCOUPLER-14 and DIYCOUPLER-12 fittings allow two compatible MRCOOL DIY Quick Connect line sets to be connected together, supporting installations up to 75 feet per zone when allowed by the system specifications.

Better Protection for More Demanding Installations
For simple, short runs, regular control wire may be sufficient. For longer runs or installations where the cable may be exposed to tougher routing conditions, the MC5 Pro Cable provides a stronger, more protected solution.

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Key Features

• Includes 75' MC5 Pro Cable with metal-reinforced shielding
• Provides a continuous control wire connection with no splicing required
• Includes DIYCOUPLER-14 and DIYCOUPLER-12 fittings for extending compatible MRCOOL DIY Quick Connect line sets
• Supports line set extensions up to 75 feet per zone, depending on system specifications
• Compatible with select MRCOOL DIY wall-mounted air handlers and ceiling cassette air handlers
• Works with compatible MRCOOL DIY R-410A and R-454B systems
• Designed for DIY-friendly installation with no cutting, brazing, or vacuuming of the refrigerant lines

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Compatible with R-410A and R-454B MRCOOL DIY Systems

This coupler and Pro Cable kit can be used with compatible MRCOOL DIY systems using either R-410A or R-454B refrigerant. The refrigerant type does not change the purpose of this kit. The couplers are used to connect compatible Quick Connect line sets, while the MC5 Pro Cable provides the extended control wire connection between the indoor unit and outdoor condenser.

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Installation Overview

1. Remove the existing shorter control wire from the indoor air handler.
2. Install the included 75' MC5 Pro Cable in place of the shorter factory cable.
3. Use the DIYCOUPLER-14 and DIYCOUPLER-12 fittings to connect two compatible MRCOOL DIY Quick Connect line sets.
4. Route the Pro Cable carefully between the indoor and outdoor units.
5. Coil and secure any extra cable. Do not cut or splice the MC5 Pro Cable.

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Important Notes

• Do not cut, shorten, or splice the MC5 Pro Cable.
• Any unused cable should be neatly coiled and secured.
• Maximum line set length depends on the specific MRCOOL system being installed.
• Always confirm compatibility with your indoor unit, outdoor condenser, and installation manual before ordering.

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Kit Contents

• DIYCOUPLER-14 fitting
• DIYCOUPLER-12 fitting
• 75' MC5 Pro Cable, metal-reinforced shielded control wire

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Compatibility

The MRCOOL DIY Couplers with 75' MC5 Pro Cable Kit is compatible with select MRCOOL DIY systems using the following indoor unit sizes:

• 6,000 BTU MRCOOL DIY wall unit or ceiling cassette
• 9,000 BTU MRCOOL DIY wall unit or ceiling cassette
• 12,000 BTU MRCOOL DIY wall unit or ceiling cassette
• 18,000 BTU MRCOOL DIY wall unit or ceiling cassette

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Why Buy from MRCOOL DIY Direct?

• Genuine MRCOOL accessories and replacement parts
• Fast shipping from a trusted MRCOOL dealer
• Knowledgeable support before and after your purchase
• Trusted by homeowners, installers, and HVAC professionals nationwide

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Order Your MRCOOL DIY Couplers with 75' MC5 Pro Cable Kit Today
Choose the Pro Cable version when your installation needs a longer, stronger, shielded control wire connection instead of standard control wire.

Order now from MRCOOL DIY Direct for fast shipping and expert support.