Culvert?

[dovienya]

Where can you get something like that, probably need a 6-meter drum; dad suggested that a spirorör would be enough, but felt doubtful from a strength point of view?

"Tomtanslutning
Property owner themselves creates connection between road and plot
including a culvert, diameter 30 cm in the ditch."

 

[morsan]

http://www.lantbruksnet.se/lantbruksnet/kategori/utrustning.php?kid=5&aid=215

 

[styrman1]

Your dad has a general error. If it's in Stockholm, you can buy the ground drum at Mark och Dräneringsteknik in Länna.

 

[Mats]

You certainly don't hold a spirorör when a car or truck passes overhead.