The MRCOOL DIY coupler kit joins two pre-charged Quick Connect line sets into one longer run, using a pair of screw-on couplers, one for each line. It comes in a 1/4" x 1/2" kit and a 3/8" x 5/8" kit; choose the size that matches the two line sets you are joining.
Each kit adds 75' of DIYPro communication cable so the wiring can follow the longer route. That is the MRCOOL DIY Quick Connect coupler kit.
Features
Two Couplers Per Kit
One coupler for the liquid line and one for the suction line, sized to the kit.
Screw-On Ends
The couplers thread onto the Quick Connect fittings of both line sets, with no brazing.
Two Line Sizes
Choose 1/4" x 1/2" or 3/8" x 5/8" to match the line sets being joined.
75' DIYPro Cable Included
Each kit includes 75' of DIYPro communication cable for the extended run.
Made for DIY Line Sets
Designed for the pre-charged Quick Connect line sets used on MRCOOL DIY single-zone and multi-zone units.
Specifications
1/4" x 1/2" (9K, 12K, 18K)
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Model: DIYCOUPLER-1412K75C
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Weight: 10.36 lbs
3/8" x 5/8" (24K, 36K)
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Model: DIYCOUPLER-3858K75C
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Weight: 10.8 lbs
What's Included
- Two MRCOOL DIY Quick Connect couplers (liquid and suction sizes)
- 75' DIYPro communication cable
Installation
Homeowner-installable. This accessory is part of MRCOOL's DIY range and is installed following the instructions in MRCOOL's manual, including any wrench, torque or leak-check steps it lists. Check local electrical and building codes for any wiring or wall penetrations.
Thread each coupler onto the fitting of the first line set, then the second set onto the coupler, tightening with two wrenches without exceeding the torque in the unit's manual. Leak-test every joint with leak detection spray or soapy water before opening the service valves, and keep the combined length within the maximum run for your unit.
Resources
Shipping, Returns & Warranty
Ships to addresses in the United States only. Shipping cost is calculated at checkout.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
MRCOOL handles returns through the store you bought from, so your return comes to us. Unopened, unused MRCOOL equipment can be returned within 21 days of delivery with a return authorization from us. You pay the return shipping, and a restocking fee of up to 20% may be deducted along with payment processing fees. Opened, installed or used equipment and special-order items can't be returned.
MRCOOL does not publish a separate warranty document for the coupler kit. Its DIY 5th Gen and DIY Select warranties cover pre-charged line sets as parts of the system and do not cover labor.
Warranty claims. MRCOOL handles warranty claims directly through support.mrcool.com or (270) 366-0457. Some MRCOOL warranties cover the original purchaser only. Systems that aren't DIY need a valid installation invoice to open a claim.
About MRCOOL
MRCOOL designs heating, cooling and water-heating equipment from its home base in Hickory, Kentucky. The range runs from DIY ductless mini-splits, built around MRCOOL's patented pre-charged Quick Connect line sets, through contractor-installed mini-splits, central split systems, packaged units and gas furnaces, to HeatWise water heaters and CoolBlade HVLS fans for warehouses and shops.
MRCOOL's DIY Quick Connect line sets are copper refrigerant lines that leave the factory charged with R-454B and sealed behind screw-on fittings, made for MRCOOL DIY single-zone and multi-zone units. DIY Select and DIY Easy Pro condensers ship with an 11.5' set, the DIY Easy Pro 5th Gen with a 16' set and DIY 5th Gen systems with a 25' set; longer sets, the coupler kits that join two sets, and the LineGuard cover kit are the add-ons for longer or neater runs.
