I've become very irritated with your edits!

https://www.openstreetmap.org/node/10887451378/history#map=18/52.14003/12.82228: 
fire_hydrant:flow_capacity=300 changed to flow_rate=300 and name=H300 deleted. name=H300 is the relevant specification, if other users didn't know better: from this follows fire_hydrant:diameter=300 !!!!  This can be found many times! 

Do not make any further and comparable corrections if you are not 100% sure and you have not intensively studied the data...

Please, please, please do not make any further comparable edits if you do not understand what is meant!!!

streckenkundler