One-half-inch CPVC water pipe installed horizontally shall be supported at maximum intervals of _____ feet.

In plumbing installations, proper support of piping is crucial for maintaining structural integrity and preventing sagging or damage over time. For one-half-inch CPVC (Chlorinated Polyvinyl Chloride) water pipe, the requirement is that it must be supported at maximum intervals of 3 feet when installed horizontally. This guideline ensures that the pipe is adequately secured, reducing the risk of stress on joints and fittings, which could lead to leaks or system failures.

The 3-foot interval is particularly significant for CPVC due to its material properties. While CPVC is lightweight and resistant to corrosion, it can be more susceptible to thermal expansion and contraction compared to metal piping. Insufficient support can lead to bending or warping, especially in environments subject to temperature fluctuations. Hence, the specified support intervals align with best practices for ensuring long-term performance and reliability of the plumbing system.