Which is the final step when installing a flare fitting as described?

Which is the final step when installing a flare fitting as described?

• A. Inspect the tubing
• B. Flare the end
• C. Thread the flare onto the fitting, and then secure with two adjustable wrenches
• D. Slide the nut on the tube end

Answer: (C)

The final step is to secure the flare by threading it onto the fitting and tightening with two adjustable wrenches. After the flare is formed and the nut is in place, you mate the flare end with the male fitting and then tighten the nut against the flare. Using two wrenches ensures you don’t twist the fitting while you tighten the nut, delivering even compression and a leak-tight seal. The earlier steps—inspecting the tubing, forming the flare, and sliding the nut onto the tube—set up the correct fit and alignment, but the final tightening completes the seal.

The final step is to secure the flare by threading it onto the fitting and tightening with two adjustable wrenches. After the flare is formed and the nut is in place, you mate the flare end with the male fitting and then tighten the nut against the flare. Using two wrenches ensures you don’t twist the fitting while you tighten the nut, delivering even compression and a leak-tight seal. The earlier steps—inspecting the tubing, forming the flare, and sliding the nut onto the tube—set up the correct fit and alignment, but the final tightening completes the seal.