Plumber Red Seal · Question
A plumber is preparing to solder a 19 mm (3/4 inch) copper potable water line. They have cleaned the tubing and fitting socket thoroughly. What is the next crucial step before applying flux?
Dry fitting the joint is a crucial step to ensure the tubing fully enters the fitting socket, preventing cold joints or insufficient solder penetration. Anneali
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Question: A plumber is preparing to solder a 19 mm (3/4 inch) copper potable water line. They have cleaned the tubing and fitting socket thoroughly. What is the next crucial step before applying flux?
Answer options:
- Anneal the copper tubing
- Rough up the surfaces with sandpaper
- Test for continuity with an ohmmeter ✅ Dry fitting the joint to ensure proper depth
Correct answer: Dry fitting the joint to ensure proper depth
Explanation: Dry fitting the joint is a crucial step to ensure the tubing fully enters the fitting socket, preventing cold joints or insufficient solder penetration. Annealing is not required for soldering, roughing up implies improper cleaning, and testing continuity is irrelevant to the soldering process.
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