For horizontal 1" CPVC pipe, what is the maximum support interval?

The maximum support interval for horizontal 1" CPVC pipe is 3 feet. This specification is crucial for ensuring that the piping system remains stable and secure during both installation and operation. The support intervals are established to prevent sagging and undue stress on the joints and connections, which could lead to leaks or failures over time.

In the case of CPVC, proper support is essential, especially because this type of plastic pipe can expand and contract with temperature changes. By adhering to the specified support interval, you can help maintain the integrity of the plumbing system and ensure that it functions efficiently and safely.

Other support intervals mentioned in the other choices typically apply to different sizes or types of pipes or may not take into account the specific characteristics and requirements of CPVC. Therefore, understanding the correct support interval is critical for compliance with plumbing codes and for the long-term reliability of the installation.