An Armstrong copper coupling is a solderless mechanical fitting used in HVAC to create permanent, leak-free connections in refrigerant and hydronic piping systems without the need for brazing or soldering. It features a unique torque-activated sealing ring that, when tightened with a calibrated wrench, cold-welds to the copper tube, providing a reliable, vibration-resistant seal that is ideal for installations in tight spaces or where an open flame would be a safety hazard.
Armstrong Copper Coupling
Size
1/2 inch
1/4 inch
3/4 inch
3/8 inch
5/8 inch
7/8 inch
1 1/8 inch
1 3/8 inch
1 5/8 inch
2 1/8 inch
2 5/8 inch
3 1/8 inch
4 1/8 inch
