"drip leg" versus "sediment trap"

[Jerry Peck - Codeman]

Dear Codeman,

I've seen some comments that indicate that drip legs ARE NOT required when wet gas is not delivered. In my area (Virginia), Washington Gas hasn't delivered wet gas for a long time; yet a home inspector is telling me that a drip leg needs to be installed on the gas line.

If he's confusing with a sediment trap (he doesn't realize it's two different things?) - how can I tell if I have an internal sediment trap? Or if an external one needs to be installed?

Many thanks in advance for your assistance.

[Jerry Peck - Codeman]