Wooden water pipes dating back to 1812 were found during water line maintenance in Philadelphia.  This is an older article from 2017 but I just came across it recently.  I wonder what the pros/cons are versus modern piping?  By the look of it, they seem to be cedar but I could be wrong.  
Wooden Water Pipes in Philadelphia
			
			Wooden Water Pipes in Philadelphia
 
				
		 
			 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		