Terry's Tips are personal observations based on my experience and seeing the cause and effects of things. There may be many ways to address different problems and all opinions are welcome. I am always open to suggestions and certainly want you to correct me on any mistakes that might be written.
If you look and listen to your house, it will talk to you. Are you listening?
If you have cast iron waste piping you want to be looking for signs like this. Cast Iron corrodes from the inside out. These nodes or scabs are self sealing pin holes. The fluid that comes out of the holes is obviously a health concern. The pipes are fully depreciated and should be replaced.