Skip to content

Mr Cool DIYCOUPLER-38 + DIYCOUPLER-58 (Two Sets) w/ 75 ft of Communication Wire, DIYCOUPLER-3858K75

by Mr Cool
Original price $196.00 - Original price $196.00
Original price
$196.00 - $196.00
Current price $196.00

Free Shipping. No Sales Tax (besides NY).

The MrCool DIY Line Set Coupler Kit for 24k & 36k Line Set could be exactly what you need to get your MrCool DIY ductless mini-split installation just right. Use this coupler kit to connect MrCool DIY line sets of any length. That may allow you the extra flexibility your installation site needs to place the air handler and condenser precisely where they will operate most effectively and efficiently for your air comfort.

Also, the MrCool DIY Line Set Coupler Kit for 24k & 36k Line Set is effective for MrCool DIY multi-zone installations. For those sorts of jobs, this coupler kit is an essential piece of hardware. You may require one, two, or more kits in order to complete your full DIY installation. Should you have any questions about how many kits might be necessary for your next job, contact our customer support team.

The MrCool DIY Line Set Coupler Kit for 24k & 36k Line Set is only for use with the MrCool DIY Quick Connect line set used for MrCool DIY ductless mini splits that have a 24k or 34k air handler. This coupler kit is not compatible with other MrCool DIY units or ductless systems, the MrCool Universal, or any third-party HVAC product, ductless or otherwise. Please do not attempt to use this kit in any non-approved application, since it will likely malfunction and will certainly void your warranty.

The 24k & 36k BTU MrCool DIY Line Set Coupler Kit is an IWAE product that you can configure to meet your specific installation needs. The basic kit includes over 50 feet of wire, a liquid coupler, and a suction coupler for connecting up to 2 line sets together. The secondary kit has over 75 feet of wire, two liquid couplers, and two suction couplers for connecting up to 3 line sets together. Choose the right MrCool DIY Line Set Coupler Kit for your DIY install.
MRCOOL's 75-ft line set coupler kit extends the length of your Quick Connect line set for the 24K and 36K air handler. 
  • 75 foot communication wire connects air handler to condenser.
  • Compatible with 24K and 36K line sets.
  • Compatible with 16-ft Quick Connect Line Set, MCR-DIY163858 (sold separately).
  • 3/4-in insulation sleeve prevents condensation.
  • Dimensions: 11-in (L) x 22.5-in (W) x 4.5-in (H).


  • Model: DIYCOUPLER-3858K
  • Warranty: None
  • Weight (lbs): 23.0000
  • California Residents: see Prop 65 WARNING


What are typical shipping & processing times for MRCOOL?

Order processing time is 2-3 business days if the item is in stock. 

Delivery takes 7-14 business days.

If a unit is not in stock, it will have a unique lead time depending on the SKU. 

Once we receive your order, we will send you a confirmation email, and then we process the order by confirming it is in stock and ready for shipment. If any of the items in your order are backordered, we will reach out to you via e-mail or phone and you may choose to either wait or receive a 100% refund.

We work very hard to ensure that we offer the best prices online. If you find another legitimate online store that offers a lower prices on an identical item we stock (including shipping, tax, etc), we will match the competitor's price and provide superior customer service.

Please give us a call, email, or live chat with the price and link to the product. 

**We DO NOT price match with large retailers such as Home Depot, Sams Club, Costco, Ebay, etc.**

**We will not match pricing on products being sold under Minimum Advertising Price guidelines**

  • Promotions such as rebates and buy one, get one free offer are not eligible
  • The item must be in stock on the competitors' website
  • The competitor must be an online store, they may not have a retail location
  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
  • The competitor must be an Authorized Retailer of the product in question, and must not be violating advertising price agreements with the manufacturer
  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

There may be brands excluded from that offer. Please contact us for further information.

Customer Reviews

No reviews yet