Horizontal copper shall be supported at ____ foot intervals for 1 inch and smaller and ______ foot for 1 1/4 and bigger.

Horizontal copper shall be supported at ____ foot intervals for 1 inch and smaller and ______ foot for 1 1/4 and bigger.

• A. 6, 10
• B. 4, 8
• C. 8, 12
• D. 5, 7

Answer: (A)

Horizontal copper water tube must be supported at regular intervals to prevent sagging and stress on joints from weight and thermal expansion. For tubes 1 inch and smaller, the span is six feet between supports. For tubes 1 1/4 inch and larger, the span increases to ten feet because bigger pipes are stiffer and heavier and can safely cover a longer distance between supports. The option that lists six feet for the smaller size and ten feet for the larger size matches these standard spacings. Other pairs don’t align with typical plumbing code requirements, since they would impose too-frequent or too-sparse supports for the given diameters.

Horizontal copper water tube must be supported at regular intervals to prevent sagging and stress on joints from weight and thermal expansion. For tubes 1 inch and smaller, the span is six feet between supports. For tubes 1 1/4 inch and larger, the span increases to ten feet because bigger pipes are stiffer and heavier and can safely cover a longer distance between supports. The option that lists six feet for the smaller size and ten feet for the larger size matches these standard spacings. Other pairs don’t align with typical plumbing code requirements, since they would impose too-frequent or too-sparse supports for the given diameters.