For CPVC pipe, support intervals are 3 feet for 1 inch or less and 4 feet for larger pipes.

For CPVC pipe, support intervals are 3 feet for 1 inch or less and 4 feet for larger pipes.

• A. 3 feet, 4 feet
• B. 4 feet, 6 feet
• C. 2 feet, 3 feet
• D. 5 feet, 8 feet

Answer: (A)

Proper support spacing for CPVC pipe is about where to place supports along a run to prevent sag and reduce stress as the pipe expands and contracts with temperature. The standard is 3 feet of support for pipes 1 inch in diameter or smaller, and 4 feet for larger-diameter pipes. This balance keeps smaller, more flexible runs from sagging while allowing longer spans where the pipe is stiffer. That's why the option listing 3 feet for small pipes and 4 feet for larger pipes matches the rule. The other options don't fit: 4 feet for small pipes is too close to the large-pipe spacing, 6 feet for large pipes is too far apart, 2 feet for small and 3 feet for large is overly tight, and 5 feet for small with 8 feet for large is not the standard.

Proper support spacing for CPVC pipe is about where to place supports along a run to prevent sag and reduce stress as the pipe expands and contracts with temperature. The standard is 3 feet of support for pipes 1 inch in diameter or smaller, and 4 feet for larger-diameter pipes. This balance keeps smaller, more flexible runs from sagging while allowing longer spans where the pipe is stiffer. That's why the option listing 3 feet for small pipes and 4 feet for larger pipes matches the rule. The other options don't fit: 4 feet for small pipes is too close to the large-pipe spacing, 6 feet for large pipes is too far apart, 2 feet for small and 3 feet for large is overly tight, and 5 feet for small with 8 feet for large is not the standard.