Plumbers and pipefitters use which tool to flare copper tubing and connect?

Study for the NOCTI Plumbing Test. Prepare with flashcards and multiple choice questions, each question comes with hints and explanations. Ensure your success on the exam!

Multiple Choice

Plumbers and pipefitters use which tool to flare copper tubing and connect?

Explanation:
Forming the end of copper tubing into a flare is what lets a secure, leak-free connection be made with a flare nut. A flaring tool clamps the tube and expands the end into a precise cone-shaped flare that the nut and ferrule bite against to seal under pressure. Deburring helps remove burrs after cutting to prevent cracks and ease assembly, but it doesn’t create the flare. Cutting tools only shorten the tube; they don’t shape the end for joining. For most potable-water and HVAC copper lines, a single flare is used, with the flare tool producing the correct end geometry for a reliable connection.

Forming the end of copper tubing into a flare is what lets a secure, leak-free connection be made with a flare nut. A flaring tool clamps the tube and expands the end into a precise cone-shaped flare that the nut and ferrule bite against to seal under pressure. Deburring helps remove burrs after cutting to prevent cracks and ease assembly, but it doesn’t create the flare. Cutting tools only shorten the tube; they don’t shape the end for joining. For most potable-water and HVAC copper lines, a single flare is used, with the flare tool producing the correct end geometry for a reliable connection.

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