Support spacing for CPVC pipe is _______.

Support spacing for CPVC pipe is _______.

• A. not specified by code
• B. farther apart than copper
• C. equal to other piping material
• D. closer together than all other piping material

Answer: (D)

The key idea is how material properties affect how often pipe must be supported. CPVC is a plastic with a higher coefficient of thermal expansion and less rigidity than metals like copper or steel. Because it expands and contracts more with temperature changes and is less resistant to bending under load, longer unsupported lengths can lead to sagging, misalignment, or stress on the joints. To prevent these issues and protect the integrity of the solvent-welded joints, codes require CPVC to be supported more frequently than other piping materials. That’s why the correct statement is that support spacing for CPVC is closer together than all other piping materials.

The key idea is how material properties affect how often pipe must be supported. CPVC is a plastic with a higher coefficient of thermal expansion and less rigidity than metals like copper or steel. Because it expands and contracts more with temperature changes and is less resistant to bending under load, longer unsupported lengths can lead to sagging, misalignment, or stress on the joints. To prevent these issues and protect the integrity of the solvent-welded joints, codes require CPVC to be supported more frequently than other piping materials. That’s why the correct statement is that support spacing for CPVC is closer together than all other piping materials.