[Tagging] Question about waterway=pressurized

[Volker Schmidt]

A siphon is inverted-U-shaped, an inverted siphon is U-shaped. There is an
additional trick with these waterway underpasses: the lowest part has a
reduced diameter. That in increases the water speed and prevents deposits.




On Tue, 14 Sep 2021, 09:39 Martin Koppenhoefer, <dieterdreist at gmail.com>
wrote:

>
>
> sent from a phone
>
> > On 14 Sep 2021, at 09:27, Volker Schmidt <voschix at gmail.com> wrote:
> >
> > I have started using tunnel=culvert, culvert=inverted_siphon for these
> waterway underpasses. They are frequent here in Northern Italy.
>
>
> what’s the difference between an inverted siphon and a siphon?
>
> Cheers Martin
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