How is a ventilation duct with a silencer installed through waterproofing?

[Sir_fixalot]

I can't find any good products for implementing a ventilation duct through the roof and waterproofing that also includes a silencer as a start. Help me!

There are cuffs in type EPDM to put on a spiral duct, but it feels a bit flimsy. There are roof collars with a socket or nipple on one side, but then there's no connection on the other side (I assume they're supposed to be glued to the wall).

I've sketched my own solution, but it involves several articles.

I would ideally like a solution where a roof collar with a nipple facing down and a socket facing up exists as an interface to the silencer. This way, it can be quickly removed if needed, and the underlying parts remain at the waterproofing level.

 

[svartöra]

Isn't that the same thing as this piece:

(https://ventilation.se/sv/products/tak-vaggstos-med-genomforing-160) plus a sleeve?

 

[Sir_fixalot]

Doesn't that become the same thing as this piece:
[image]
([link]) plus a coupling?

Thanks!
Yes, that's roughly what I'm looking for: It might be a bit high possibly.