[Tagging] Question about waterway=pressurized

[Mark Wagner]

On Tue, 14 Sep 2021 09:33:54 +0200
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?
> 

A siphon goes over an obstacle; an inverted siphon goes under one.

-- 
Mark