Plumber Red Seal · Question
According to the CSA B149.1 code, where is the correct installation location for a sediment trap (drip leg) on a natural gas appliance?
A sediment trap is intended to catch debris or moisture in the gas line. The code requires it to be installed as close to the appliance inlet as practical, down
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Question: According to the CSA B149.1 code, where is the correct installation location for a sediment trap (drip leg) on a natural gas appliance?
Answer options:
- On the vertical pipe dropping down to the appliance control valve
- At the lowest point in the entire gas piping system
- Before the main gas meter for the building ✅ On the horizontal piping, just before the final turn to the appliance
Correct answer: On the horizontal piping, just before the final turn to the appliance
Explanation: A sediment trap is intended to catch debris or moisture in the gas line. The code requires it to be installed as close to the appliance inlet as practical, downstream of the shutoff valve, and configured (typically with a tee) so that sediment falls into the trap instead of continuing into the appliance controls.
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