The code-writing organizations are currently finalizing the 2021 edition of the Plumbing Code, which may be adopted in your state or local jurisdiction by 2023. That is how far in advance hot subjects that are being discussed now wait before becoming law.
Many of the hot topics in plumbing center on one word: Legionella. Legionella is the shortened word used to identify the bacteria that causes Legionnaires’ disease. Unfortunately for the plumbing profession, Legionella can exist in the potable water supply. If it does exist, it can multiply to the point of sickening building occupants with Legionnaires’ disease.