For copper piping 1-1/4 inch or smaller, what is the maximum vertical spacing?

For copper piping 1-1/4 inch or smaller, what is the maximum vertical spacing?

• A. 6 feet
• B. 8 feet
• C. 10 feet
• D. 12 feet

Answer: (C)

Regular support spacing is essential to keep piping stable and to prevent sag, movement, and stress at joints. For copper piping 1-1/4 inch or smaller, the code specifies that the maximum distance between supports in a vertical run is 10 feet. This spacing provides enough rigidity to prevent noticeable deflection while keeping installation practical. If a vertical run were longer than 10 feet, an additional support would be needed to maintain proper support and avoid potential failures. The other options would either require more frequent supports than necessary or exceed the allowable limit, which is why 10 feet is the correct maximum.

Regular support spacing is essential to keep piping stable and to prevent sag, movement, and stress at joints. For copper piping 1-1/4 inch or smaller, the code specifies that the maximum distance between supports in a vertical run is 10 feet. This spacing provides enough rigidity to prevent noticeable deflection while keeping installation practical. If a vertical run were longer than 10 feet, an additional support would be needed to maintain proper support and avoid potential failures. The other options would either require more frequent supports than necessary or exceed the allowable limit, which is why 10 feet is the correct maximum.