What is the maximum spacing between anchors for a 6-inch main in vertical orientation?

What is the maximum spacing between anchors for a 6-inch main in vertical orientation?

• A. 8 feet
• B. 12 feet
• C. 14 feet
• D. 10 feet

Answer: (D)

Keeping vertical pipe aligned and able to resist the weight and movement of a water-filled main requires supports at reasonable intervals. For a 6-inch main in a vertical run, the supports are spaced to prevent sagging and misalignment at the fittings and sprinklers. The maximum allowed spacing is 10 feet, so this is the best answer. Spacing at 12 or 14 feet would exceed the limit and risk deflection, while 8 feet would be more conservative but not the maximum.

Keeping vertical pipe aligned and able to resist the weight and movement of a water-filled main requires supports at reasonable intervals. For a 6-inch main in a vertical run, the supports are spaced to prevent sagging and misalignment at the fittings and sprinklers. The maximum allowed spacing is 10 feet, so this is the best answer. Spacing at 12 or 14 feet would exceed the limit and risk deflection, while 8 feet would be more conservative but not the maximum.