A type of copper tube joint is:

A type of copper tube joint is:

• A. Soldered
• B. Flared
• C. Compression
• D. All of the above

Answer: (D)

Copper tube joints can be made in several reliable ways. Soldered (sweated) joints involve cleaning and fluxing the tube ends, heating with a torch, and filling the joint with solder to create a sealed metal connection. Flared joints require forming the tube end with a flare tool and tightening a flare nut to seal the joint; the flare provides a tight metal-to-metal seal as the nut compresses the flare against the fitting. Compression joints use a nut and ferrule (olive); as you tighten the nut, the ferrule clamps the tube against the fitting to create a seal without heat. Because each method is a valid, widely used way to join copper tubing, all of the above is correct.

Copper tube joints can be made in several reliable ways. Soldered (sweated) joints involve cleaning and fluxing the tube ends, heating with a torch, and filling the joint with solder to create a sealed metal connection. Flared joints require forming the tube end with a flare tool and tightening a flare nut to seal the joint; the flare provides a tight metal-to-metal seal as the nut compresses the flare against the fitting. Compression joints use a nut and ferrule (olive); as you tighten the nut, the ferrule clamps the tube against the fitting to create a seal without heat. Because each method is a valid, widely used way to join copper tubing, all of the above is correct.