What are the standard sizes for the background and letters identifying a 1" nonpotable line?

The standard sizes for the background and letters identifying a 1" nonpotable line are established to ensure clear visibility and compliance with regulations regarding the marking of nonpotable water sources. The specifications require the background to be 8 inches in width, creating a prominent visual cue that can be easily seen. The letter height of 0.5 inches on this background is also standardized to ensure the markings are legible from a reasonable distance.

The choice of an 8-inch background paired with 0.5-inch letters effectively balances visibility and aesthetics, which is essential for safety and compliance with plumbing codes. Correct identification is crucial to prevent cross-contamination or misuse of nonpotable water lines in various plumbing applications. This standardization assures that anyone working with or around these lines can easily recognize the potential hazards associated with nonpotable water.