Thats wierd, it us usually no more than 150mm from the ground were the pipe enters the building.
Have you followed the pipes back to a vertical rising main in the corner of any rooms?
Don't know if its still worth looking if a plumber has looked and cant find anything.
Have you followed the pipes back to a vertical rising main in the corner of any rooms?
Don't know if its still worth looking if a plumber has looked and cant find anything.