In the second hour, Dean delves into plumbing challenges, particularly focusing on the descaling of drains. He discusses the costly process of mechanically rescaling old cast iron pipes and the risks involved, especially with older plumbing. Dean offers practical advice on using white vinegar as a regular, natural descaling solution and talks about enzyme treatments to break down food waste in pipes. He emphasizes the importance of preventative measures, like scraping food into the garbage before using the disposal, to maintain clean and functional drains.