Wood pipes apparently have some surprising advantages. For one thing, the wood doesn't rot when it's immersed constantly in fresh water. The pipes don't corrode

Wood pipes apparently have some surprising advantages. For one thing, the wood doesn't rot when it's immersed constantly in fresh water. The pipes don't corrode as easily, and the water doesn't freeze as easily either: https://en.wikipedia.org/wiki/Piping#History https://en.wikipedia.org/wiki/Piping#History