Hogwart's toilets

[michaelkgidlow]

No: HPFGUIDX 70833

Does anyone think it odd that Hogwarts is a thousand year old castle 
yet has bathrooms with modern plumbing? And from CoS, it would seem 
that it has had this modern plumbing since it's founding (since the 
entrance to the CoS is a sink). Does this mean that Wizards invented 
modern plumbing centuries before muggles did? Yes, ancient Rome had 
plumbing, but not like the toilets and sinks in Hogwarts. Any ideas?

Michael Gidlow