MRCOOL DIY® Coupler Kit – 1/2" x 1/4" or 3/8" x 1/4" Quick Connect (No Communication Wire)

MRCOOL DIY® 1/2" x 1/4" Coupler Kit – Without Communication Wire

Easily extend your MRCOOL DIY® system with this 1/2" x 1/4" Coupler Kit. Designed to connect two pre-charged Quick Connect line sets together, this kit gives you the flexibility to run longer refrigerant lines while keeping installation simple.

🔹 Important Notes:

• This listing is for couplers only (no communication/control wire included).

• If you extend your system beyond the standard 25 ft. line set, you may also need an extended control wire kit. We offer couplers with control wire included if needed.

• Many homeowners choose to route refrigerant lines and control wires along different paths — these couplers make that possible.

Compatibility:

• Works with single-zone and multi-zone systems.

• Compatible with both 4th Gen and older MRCOOL systems (R-410A) and 5th Gen systems (R-454B).

• For 6k, 9k, 12k, and 18k air handlers (wall and ceiling cassette).

• 24k and 36k air handlers require a larger coupler kit (sold separately).

Key Features:

• Simple Extensions – Connects two pre-charged line sets for longer runs.

• DIY Friendly – Quick Connect fittings mean no vacuum pumps or special tools required.

• Durable & Reliable – Leak-free construction ensures long-lasting performance.

• Flexible Routing – Allows refrigerant lines and control wires to be run separately if desired.

• Two Couplers Needed – Each extension requires two couplers (one for each line).

Specifications:

• Size: 1/2" x 1/4" Quick Connect

• Use With: MRCOOL DIY® 6k–18k air handlers

• ⚠️ Note: 24k and 36k units require a larger coupler kit (sold HERE).

• Control Wire: Not included with this listing

Upgrade your MRCOOL DIY® system with confidence. This coupler kit makes it easy to extend your refrigerant lines, giving you the flexibility and reliability you need for a professional-quality installation — without the hassle.