The MRCOOL flared copper line set carries refrigerant between a ductless indoor head and its condenser. Each set is a pair of insulated copper lines with flare nuts on the ends, sized to the head: 1/4" x 3/8" for 9K and 12K units, 1/4" x 1/2" for 18K and 3/8" x 5/8" for 24K, in 16', 25' and 50' lengths.
It suits contractor-installed Olympus and Advantage systems, where the lines must be evacuated before the valves are opened. Installation is by a licensed HVAC contractor. This is MRCOOL's flared copper line set.
Features
Sized to the Head
Three line pairs, 1/4" x 3/8", 1/4" x 1/2" and 3/8" x 5/8", follow the 9K/12K, 18K and 24K capacities.
Three Lengths
16', 25' and 50' sets cover a short wall pass through to a long run around the house.
Insulated Lines
Each copper line is wrapped in its own white insulation sleeve to limit sweating and heat loss.
Flare Nuts Fitted
Flared ends with flare nuts connect straight to the flare ports on Olympus and Advantage units.
Wire with Shorter Sets
MRCOOL lists the 16' and 25' sets with communication wire.
Made for Pro Installs
The lines arrive empty, so a technician pressure tests and pulls a vacuum before releasing the charge.
Specifications
16', 1/4" x 3/8"
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Model: MC16-1438
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Included Line Set: 16'
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Max Line Set Length: 16'
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Liquid Line: 1/4"
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Suction Line: 3/8"
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Color: Copper
16', 1/4" x 1/2"
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Model: MC16-1412
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Included Line Set: 16'
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Max Line Set Length: 16'
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Liquid Line: 1/4"
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Suction Line: 1/2"
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Color: Copper
16', 3/8" x 5/8"
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Model: MC16-3858
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Included Line Set: 16'
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Max Line Set Length: 16'
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Liquid Line: 3/8"
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Suction Line: 5/8"
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Color: Copper
25', 1/4" x 3/8"
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Model: MC25-1438
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Included Line Set: 25'
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Max Line Set Length: 25'
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Liquid Line: 1/4"
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Suction Line: 3/8"
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Color: Copper
25', 1/4" x 1/2"
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Model: MC25-1412
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Included Line Set: 25'
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Max Line Set Length: 25'
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Liquid Line: 1/4"
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Suction Line: 1/2"
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Color: Copper
25', 3/8" x 5/8"
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Model: MC25-3858
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Included Line Set: 25'
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Max Line Set Length: 25'
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Liquid Line: 3/8"
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Suction Line: 5/8"
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Color: Copper
50', 1/4" x 3/8"
50', 1/4" x 1/2"
50', 3/8" x 5/8"
What's Included
- MRCOOL insulated flared copper line set (liquid and suction lines) in the selected length and size
- Flare nuts on the line ends
- Communication wire on the 16' and 25' sets
Installation
Professional installation required. This equipment must be installed by a licensed HVAC contractor (EPA Section 608-certified for any refrigerant work), following MRCOOL's installation manual and all local codes, permits and licensing rules. MRCOOL's limited warranty applies only to units installed that way, and it does not cover installation labor.
Match the line sizes to the condenser and head spec: 1/4" x 3/8" (9K and 12K), 1/4" x 1/2" (18K), 3/8" x 5/8" (24K). Torque the flare nuts to the values in the condenser installation manual, then pressure test and evacuate the lines before opening the service valves. Runs longer than the condenser's 25' standard length may need extra refrigerant.
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 publishes no warranty document that names this part, and none of the warranty documents we hold lists it; ask MRCOOL for the terms that apply with your system.
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.
These flared copper line sets connect MRCOOL's professionally installed ductless heat pumps, the Olympus and Advantage ranges, whose indoor heads use flare connections. Sizes follow the head capacity: 1/4" x 3/8" for 9K and 12K, 1/4" x 1/2" for 18K and 3/8" x 5/8" for 24K. MRCOOL's DIY systems use their own pre-charged Quick Connect line sets instead.
