Had a home inspection recently that indicated this drain may not be trapped. It's a wet bar in my basement that we've never used since we bought the place. The sink works fine, just never used it.
The main drain for the house runs somewhere near there. The laundry room is in the next room and that is where the main drain for the house is located (public sewer). The main drain is about 10ft from this sink.
Is there any simple tests I can do to determine of there is a trap in the concrete or if it's protected by another trap?