MRCOOL 3.5" Wall Sleeve and Cap Kit MCSLEEVE - Clean HVAC Line Set Installation
SKU: 98968188763

MRCOOL 3.5" Wall Sleeve and Cap Kit MCSLEEVE - Clean HVAC Line Set Installation

Sale price$59.40 Regular price$66.00
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Description

MRCOOL 3.5" Wall Sleeve and Cap Kit MCSLEEVE - Clean HVAC Line Set InstallationMRCOOL 3. 5" Wall Sleeve & Cap Kit (MCSLEEVE) Mini Split Line Set Wall Pass Through MRCOOL DIY Direct The MRCOOL 3. 5" Wall Sleeve and Cap Kit (MCSLEEVE) ensures a clean, professional finish when routing pre charged or traditional HVAC line sets through a wall. Designed for both new installations and retrofit projects, this genuine MRCOOL accessory protects your HVAC lines from wear, weather, and abrasion while maintaining a polished, finished

MRCOOL 3.5" Wall Sleeve & Cap Kit (MCSLEEVE) — Mini-Split Line Set Wall Pass-Through | MRCOOL DIY Direct

The MRCOOL 3.5" Wall Sleeve and Cap Kit (MCSLEEVE) ensures a clean, professional finish when routing pre-charged or traditional HVAC line sets through a wall. Designed for both new installations and retrofit projects, this genuine MRCOOL accessory protects your HVAC lines from wear, weather, and abrasion while maintaining a polished, finished appearance.

Built with durable, high-quality materials, the MCSLEEVE Wall Pass-Through Kit helps reduce long-term wear and improves the efficiency and reliability of your mini-split system installation. It’s easy to install and compatible with all MRCOOL systems — including DIY Series and Advantage Series units.

Key Features & Benefits

  • Professional Finish: Provides a clean, sealed wall pass-through for HVAC line sets, improving appearance and protection.
  • Durable Construction: Made from tough, long-lasting materials designed to resist wear and weather exposure.
  • Easy Installation: Installs quickly for both new MRCOOL mini-split setups and replacements.
  • Protects Pre-Charged Line Sets: Prevents kinking and abrasion of refrigerant lines and insulation.
  • Genuine MRCOOL Replacement Part: Engineered for perfect fit and compatibility with MRCOOL systems.

Technical Specifications

  • Product Type: Wall Sleeve & Cap Kit
  • Brand: MRCOOL
  • Model Number (MPN): MCSLEEVE
  • Diameter: 3.5"
  • Compatibility: MRCOOL DIY Series, Advantage Series, and other mini-split systems
  • Application: Wall pass-through for HVAC line sets and condensate hoses
  • Material: High-Density ABS Plastic
  • Includes: Wall Sleeve Tube & End Cap
  • Installation Type: Interior / Exterior
💡 Pro Tip: MRCOOL’s 3.5" wall sleeve is specifically sized to accommodate the Quick Connect pre-charged line sets used in MRCOOL DIY systems. The extra internal diameter allows the pre-insulated refrigerant lines to pass smoothly through the wall opening without compression or tearing. Always align your sleeve angle slightly downward toward the exterior for proper condensate drainage and professional finish.
Buy from MRCOOL DIY Direct — the USA’s trusted source for genuine MRCOOL parts and accessories. Enjoy nationwide delivery, fast shipping, and dedicated customer support for all your MRCOOL installation needs.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98968188763

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Ms. Rea
Lexington, US
★★★★★ 5
It's perfect support.
Size: Extra Back Support (21-Inch), Color: Dark Grey
The best way to describe the super comfy reading pillow is super comfy. I use it to sit up while watching something soothing to my mind on tv and due to its comfyness and softness, it's perfectly just right for my back. The funny thing is within a few minutes I'm knocked out sleep, which is a good thing. It's soft but firm lumbar area and arms feels oh so comfortable. It gives the best sleep quality and less toss and turning. I highly recommend.
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Reviewed in the United States on May 7, 2026
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Michael Simko
Lake Worth, US
★★★★★ 4
Great Size and Comfort
Size: Extra Back Support (21-Inch), Color: Dark Grey
2 months after buying a different reading pillow I felt it was time to buy a different one based on the comfort and support. I found this one listed for a good price. After carefully looking through the listing, I bought the 21" size. On my first night of usage, I was already impressed with the comfort and support vs the reading pillow I had bought 2 months prior. I like how this one has nice support for my neck and head as I'm relaxing on my bed with my laptop and phone. The texture of the filling gives it a very nice combination of cushioning and firmness. The horizontal feature line in the center of the pillow is a nice feature for back and neck support thanks to it giving the pillow some flexibility. As for the arms, their length, width, height, and cushioning are very good for resting my arm while I'm using the wireless mouse with my laptop.
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Reviewed in the United States on February 27, 2026
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GhostFingersXP
Pawtucket, US
★★★★★ 5
Book Reading Wife Approved
Size: Standard (18-Inch), Color: Sage Green
I purchased this for my wife who reads quite a bit and she absolutely loves it. She said it feels soft, is the right size for her, and makes book reading more comfortable for her. I call it a win.
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Reviewed in the United States on April 23, 2026
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A Brown
Massapequa, US
★★★★★ 3
Not good quality
Size: Standard (18-Inch), Color: Dark Grey
Comfy, however it’s getting flat an only had it a week
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Reviewed in the United States on April 27, 2026
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Linda F. Del Valle
Omaha, US
★★★★★ 5
Love this ❤️❤️
Size: Standard (18-Inch), Color: Rose Pink
Love love super comfy soft yet firm Great quality good value the material is sturdy
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