There's supposedly 7 pumping stations in Edinburgh. 

All seem to be inconsistent in the tagging. 

Joppa is tagged as - 
landuse: industrial
man_made: wastewater_pumping_station

Prestonpans is tagged as 
man_made: wastewater_plant
wastewaster_plant: pumping_station.

Trinity - 
building:yes
mand_made: wastewater_plant
