Dive into the 2025 Massachusetts Plumbers Journeyman Challenge – Master Your Pipes and Make Waves!

The correct size for the lettering on tags for non-potable water supply lines is specified to be 7/16 inches. This size is determined to ensure that the information is legible and easily identifiable, which is crucial for safety and compliance in plumbing systems. Properly sized lettering can help prevent confusion and misuse of non-potable water supply lines, which can have critical implications for health and safety. Ensuring that the tags are marked appropriately allows for better communication of the nature of the water supply, ultimately supporting best practices in plumbing installations.