I have seen the industry change from using cast iron, to galvanised pipes to polyvinyl chloride (PVC) pipes. PVC is much easier to work with. When you had the cast iron you had to have lead and oakum ...

Q-I recently was visiting with some friends. While sitting in their family room, I heard water rush down the wall next to me. It was very objectionable. Evidently, someone had just flushed the toilet ...