What is the minimum support distance for nominal 1-inch iron pipe?

For nominal 1-inch iron pipe, the minimum support distance is established based on industry standards to ensure the pipe can properly support itself and avoid sagging or damage due to weight or stress. The minimum support distance of 8 feet allows for adequate support to maintain the integrity of the piping system while minimizing potential issues such as bending or breaking.

This specification is based on standard practices and is important for maintaining safety in plumbing installations. Pipes that are not adequately supported may lead to leaks or even structural failures over time, which is why adhering to these guidelines is crucial in ensuring the longevity and safety of the plumbing system.

Therefore, the correct choice reflects the requirement needed for proper installation and support of nominal 1-inch iron pipe in typical residential construction.