As mentioned on the discussion page, values such as grey water, non-potable water, recycled water values were brought up.
- non-potable means it is undrinkable for some reason. a good value.
- grey water is the nickname for water that has been throughly processed for reuse, but is considered for health/legal reasons is not intended for drinking. some cities drink it, some cities treat it as a health hazard, only for plant watering. Sounds like recycled water. I guess that is distinct from treated sewage (meets the minimum requirements for dumping into a water body).
Why water is "fresh water for drinking purposes"? It's generic. At least need a subtag
- Well but there is a problem here :) I still don't know how to tag a pipe with an unknown type of water. So I'm going to bar the "fresh - for drinking purposes". Maybe the drinking_water=* attribute is applicable here? Together with drinking_water:legal=no if the water is not accessible? --redrat 20:30, 5 July 2016 (UTC)
How to tag pneumatic tube transfer systems? Perhaps substance=pneumatic? Or maybe substance=capsules (another name for them is "capsule pipelines")? For now I think I'll use substance=pneumatic, since it is clearer (they are most commonly known as pneumatic tubes), and although it is not a substance, substance=cable is not a substance either :-) ). --Abbafei (talk) 08:20, 25 March 2015 (UTC)