id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
16147	Pressurised waterway preset	francois.lacombe	team	"Recently, waterway=pressurised was reviewed on osm wiki, encouraging the use of waterway=* key to map not only free space but pipe flow waterway features also.
https://wiki.openstreetmap.org/wiki/Tag:waterway%3Dpressurised

Waterway presets should be updated and get new entries as follow :
==Penstock==
* waterway=pressurised
* man_made=pipeline
* substance=water
* location={underground,overground}
* usage=penstock
* name=*
* operator=*
* diameter=*
* material=*

==Pipe flow tunnel==
* waterway=pressurised
* usage={headrace,tailrace,transmission,irrigation}
* location=underground
* tunnel=flooded
* name=*
* operator=*

==Canal preset should be updated as follow==
* tunnel={culvert,flooded}
* usage={transportation,transmission,irrigation,headrace,tailrace}


Main validation rules :
* usage=penstock requires man_made=pipeline and waterway=pressurised
* tunnel=yes and waterway=pressurised requires man_made=pipeline
* tunnel=flooded is highly improbable with man_made=pipeline
* waterway=canal shouldn't be used with tunnel=yes
* waterway=pressurised requires tunnel=flooded or man_made=pipeline

Render I'd suggest :
* waterway=pressurised + tunnel=* => add grey 1px casing to existing waterway line
* waterway=pressurised + man_made=pipeline => add ""pipeline color"" 1px casing to existing waterway line

I know it's huge and you may have a lot of undergoing business, it would be great to hadle this
Let me know if I can help or provide more precise things "	enhancement	new	normal		Internal preset			waterway, pressurised, tunnel, pipeline