MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 1/4" x 1/2", for DIY 18K Mini Split Indoor Air Handler

MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set

The MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable is a smart, efficient solution for extending your MRCOOL DIY 18K Mini Split system. Designed with convenience in mind, this line set is pre-charged with R-454B refrigerant and features Quick Connect fittings, eliminating the need for vacuuming or charging. The 35-foot length provides flexibility for installations in multi-level homes, detached structures, or wider layouts, and the included DIY Pro Cable ensures seamless communication and power between units.

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MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set Features

Pre-Charged with R-454B – Line set is factory-filled and sealed with environmentally friendly R-454B refrigerant for simplified installation.

Quick Connect Fittings – Uses tool-free, leak-proof connections that eliminate the need for HVAC tools or professional vacuuming.

35 Ft. Line Set Length – Perfect for medium-distance installations, including second-floor units, garages, or expanded home layouts.

Sized for 18K BTU Systems – Specifically built to pair with MRCOOL DIY 5th Gen 18K air handlers, ensuring ideal refrigerant flow and system compatibility.

Includes DIY Pro Cable – Comes with a weather-resistant communication and power cable, pre-matched to MRCOOL system standards.

Durable Outer Jacket – Features UV-resistant and weatherproof insulation to protect against environmental wear and damage.

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MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set Applications

• Multi-level homes – Great for connecting units across floors or in elevated positions

• Detached buildings – Ideal for garages, workshops, or studios separate from the main structure

• Wider room layouts – Useful in larger rooms or setups requiring extended reach

• Retrofit installs – Replaces existing line sets in older systems with a pre-charged, quick-fit solution

• DIY-friendly setups – Made for MRCOOL customers seeking a tool-free installation experience

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What’s Included?

• 35 Ft. Line Set (1/4" x 1/2")

• DIY Pro Communication and Power Cable

• Quick Connect fittings (pre-installed)
  

• Setup and safety instructions

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MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set Specifications

Series	5th Gen DIY Line Set - R-454B
Compatible Air Handlers	18K 5th Gen DIY
Line Set Length	35 ft
Lineset Fitting Type	Quick-Connection
Gross Dimensions	32.09" D x 4.92" H x 32.09" W
Color	White
Color Family	Bronze/Copper Metallic
Refrigerant Type	R-454B
Refrigerant Volume	3.46
Liquid Line Size	1/4
Suction Line Size	1/2
Registered Warranty	N/A
Has Batteries	No
Contains Electronics	No
Contains Chemicals	Yes
Contains Aerosol	Yes
Contains Compressed Gas	Yes
Proposition 65 Warning	Yes
Restricted States	GU;PR;VI
Net Weight (Lbs)	18.3
Gross Weight (Lbs)	22.7

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Frequently-Asked Questions

Is this line set compatible with 12K or 9K air handlers?
No. This specific line set is optimized for MRCOOL 18K 5th Gen systems only due to the 1/2" suction line size required for proper performance.

Does it come with refrigerant already inside?
Yes. The line set is pre-charged with R-454B refrigerant, sealed from the factory for immediate use.

Can I cut this line set to a shorter length?
No. The line set is designed to be used at its full 35-foot length. Cutting or modifying it will void the sealed system and compromise performance.

Is this safe for first-time DIY users?
Yes. MRCOOL Quick Connect systems are designed for user-friendly installation, though reviewing the manual or working with an HVAC professional if unsure is always a good idea.