Gas Fitter Practice · Question
What is the purpose of a drip leg (sediment trap) in a gas piping system?
A drip leg is installed downstream of the shutoff valve and before the appliance to collect any debris that could foul the appliance's gas valve or burner.
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Question: What is the purpose of a drip leg (sediment trap) in a gas piping system?
Answer options:
- To regulate gas pressure
- To prevent backflow of gas ✅ To collect dirt, rust, or moisture
- To measure gas flow rate
Correct answer: To collect dirt, rust, or moisture
Explanation: A drip leg is installed downstream of the shutoff valve and before the appliance to collect any debris that could foul the appliance's gas valve or burner.
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