Gas Fitter Practice · Question
When transitioning from black iron pipe to copper tubing for a gas line, what type of fitting must be used?
A dielectric union prevents galvanic corrosion between dissimilar metals, which can weaken the pipe over time.
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Question: When transitioning from black iron pipe to copper tubing for a gas line, what type of fitting must be used?
Answer options: ✅ A dielectric union.
- A galvanized coupling.
- A brass compression fitting.
- A standard threaded coupling.
Correct answer: A dielectric union.
Explanation: A dielectric union prevents galvanic corrosion between dissimilar metals, which can weaken the pipe over time.
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