InstallationQuestion 38 of 110
What is the purpose of a sediment trap (drip leg) installed near a gas appliance?
a.To regulate gas pressure
b.To vent excess gas
c.To catch moisture and debris before they enter the appliance control valve
d.To measure gas flow
Explanation
A sediment trap, or drip leg, is a short vertical section that captures moisture, rust, and debris carried in the gas stream before they reach the appliance gas valve. This protects the valve and burner orifices from clogging. The CMC requires it on many appliance connections.
Law Reference: 2022 California Mechanical Code (CMC)Practice all 110 questions free — no signup required.
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