A.C.R. Copper Coupling (C × C)
The straight coupling that joins two copper tubes of the same size end to end.
AirGreen codeAG-RC-00609
514 316-2973 · sales@airgreen.ca
Quick facts
The A.C.R. copper coupling is a straight fitting with two female ends (C × C). It joins two copper tubes of the same outside diameter end to end: each tube fits into one side, then both joints are brazed. It is the basic fitting for extensions and repairs on refrigerant lines.
The fitting for extensions and repairs
When a line is too short after a unit is moved, or a punctured or crushed section has to be replaced, you cut, insert a piece of new tube and join it to the existing line with two couplings. On a long run, the coupling also joins two coils of soft tubing. We use it on wall-mounted, multi-zone and central heat pumps as well as in commercial refrigeration.
Thirteen diameters, from 3/16 in to 2-5/8 in
The coupling is available for tubing of 3/16, 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1-1/8, 1-3/8, 1-5/8, 2-1/8 and 2-5/8 in outside diameter.
A repair done right
- Cut both ends square, deburr them and have them meet at the centre of the coupling.
- Clean the outside of the tubes and the inside of the coupling down to bright metal.
- Braze under a light flow of dry nitrogen.
- Perform a pressure test, a leak check and an evacuation before recharging the circuit.
Work on a refrigerant circuit is reserved for a qualified refrigeration technician.
Supplied and installed by AirGreen in Greater Montréal
Our refrigeration technicians repair and extend refrigerant lines in Montréal, Laval, Longueuil, on the South Shore and on the North Shore. RBQ licence 5645-9605-01. For availability or a quote, call us at 514 316-2973 or email sales@airgreen.ca with the diameter and quantity.
Extend, repair, connect
The coupling is the fitting for extensions and repairs: it puts two tube ends back in line.
- Extending a refrigerant line that is too short
- Repairing a line after cutting out a damaged or punctured section
- Joining two coils on a long run
- Replacing a brazed component on the line
13 sizes, one page
Each size has its own AirGreen code. Tap a row to select it.
| Diameter | AirGreen code |
|---|---|
| 3/16 in | AG-RC-00601 |
| 1/4 in | AG-RC-00602 |
| 5/16 in | AG-RC-00603 |
| 3/8 in | AG-RC-00604 |
| 1/2 in | AG-RC-00605 |
| 5/8 in | AG-RC-00606 |
| 3/4 in | AG-RC-00607 |
| 7/8 in | AG-RC-00608 |
| 1-1/8 in | AG-RC-00609 |
| 1-3/8 in | AG-RC-00610 |
| 1-5/8 in | AG-RC-00611 |
| 2-1/8 in | AG-RC-00612 |
| 2-5/8 in | AG-RC-00613 |
Outside diameter of the two tubes being joined, in inches.
Specifications
From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.
What to know before installing
- The coupling joins two tubes of the same outside diameter.
- Cut both ends square and have them meet in the middle of the coupling.
- Clean the outside of the tubes and the inside of the coupling before brazing.
- After a repair, pressure-test with dry nitrogen and pull a vacuum before recharging.
You may also need
A.C.R. Soft Copper Tube – 50 ft Coil
A.C.R. Copper 90° Elbow – Short Radius, Male × Female (Street)
Abrasive Cloth for Copper (Plumber’s Sand Cloth)
Silver Brazing Rods
Dry Nitrogen – Cylinder
A.C.R. Copper Cap
A.C.R. 45° Copper Elbow (C × C)
A.C.R. Copper 90° Elbow – Short Radius (C × C)Copper fittingsSee all
Frequently asked questions
Can the coupling join two different sizes?
No, this coupling joins two tubes of the same outside diameter. Going from one size to another takes a reducing fitting.
Is the size the tube or the fitting?
The outside diameter of the tube. A 1/2 in coupling takes two tubes with a 1/2 in outside diameter.
What comes after a line repair?
A dry nitrogen pressure test, a leak check, then a vacuum before putting the refrigerant back. This work is reserved for a qualified technician.
Can you do the repair?
Yes. Our technicians repair and extend refrigerant lines everywhere in Greater Montréal.
Couplings to extend and repair your lines
Tell us the size and the quantity: we confirm availability and send you a quote. Or let our technicians install it for you.
Specifications from the manufacturer’s documentation, checked on October 7, 2026.