The MRCOOL flare-to-weld fitting turns a flare connection into a brazed one. A brass flare nut threads onto the air handler connection, and a copper stub on the other end is brazed into the line set. It comes in 3/8" for the liquid line and 3/4" for the suction line.
It lets an installer braze a field line set to an air handler with flare ports. Installation is by a licensed HVAC contractor. This is MRCOOL's flare-to-weld fitting.
Features
Two Line Sizes
3/8" for the liquid line and 3/4" for the suction line, sold individually.
Flare Nut End
A brass flare nut connects to the flare fitting on the air handler.
Brazing Stub
A copper stub on the opposite end takes a brazed joint to the field line set.
Capped for Shipping
A red cap keeps the flare end clean until installation.
Air Handler Connections
MRCOOL files both sizes as fittings for air handler connections in its Universal series accessories.
Specifications
3/8"
3/4"
What's Included
- MRCOOL flare-to-weld fitting in the selected size (flare nut with copper stub)
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.
Braze the copper stub to the field line with a nitrogen purge, let it cool, then tighten the flare nut onto the air handler connection to the torque in the air handler manual. Pressure test and evacuate the system before releasing 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.
MRCOOL's flare-to-weld fittings are listed by MRCOOL for air handler connections, the 3/8" and 3/4" sizes matching the 3/8" liquid and 3/4" suction lines used on MRCOOL's central split systems. A copper stub is brazed into the line set on one end, and a flare nut connects to the air handler on the other.
