Buy culvert pipes by the meter?

[EmMi]

Våt byggvaruhus sells 6m culverts, can you buy them by the meter as well? Like 6+6+1 meter? The disadvantage is that you need another double coupling...

12 (6+6) meters of culvert is barely enough, we then only get a 35 cm overhang on each side of the road/parking lot, can that really work?

 

[Mats]

It depends on how high the drum is. Then you can use a double coupling as a small expander of 20-30 cm depending on the drum size.

 

[EmMi]

We will have a 400mm pipe. Aha, so you can extend a bit with the double socket by not pushing the pipes completely together, right?

 

[Mats]

I haven't tested it, but you could put a muff on the end that doesn't have a factory-installed muff.

With a 400 drum plus a bit of road embankment on top, you get approximately a 45-degree slope on the edges, and it works if you pack the maaterial. Then maybe you could place some stones or similar at the bottom and gain a little height that way.