I recently bought my house in the dead of winter while there was snow on the ground. The snow has recently melted and revealed that there is about a 6-8 inch plastic tube sticking out of a hole in my lawn. Anyone have any idea of what it is? It is flush with the grass and close to the sidewalk.
It's probably a vent for a drain line that drains runoff from the sidewalk away from the house. If you dug down, you'd find a length of perforated plastic pipe running parallel to the sidewalk, and out into the street or into a storm drain. In heavy rains it keeps water from pooling at the edge of the sidewalk.
Possible septic related. You didn't mention front or back of the house.
If it is closed, with a screw top lid on it, it is the cleanout for the sewer line. Open, it's an intake for a french drain as others have said.
Dig out inside the tube and see what you find. Some subdivisions have that type of protection for the water valves.
sounds like a drain pipe for water if and when you get heavy rain...
