For a 3/4 inch horizontal copper pipe, what is the maximum support spacing recommended?

The recommended maximum support spacing for a 3/4 inch horizontal copper pipe is indeed 12 feet. This specification is based on industry standards that aim to provide adequate support for pipes, preventing sagging and potential damage, while also ensuring that the installed plumbing systems function properly.

Supporting pipes at the correct intervals is crucial because it helps to distribute weight evenly and reduces stress on joints and fittings. If supports are too far apart, the pipe can bow or bend under its own weight or when subjected to thermal expansion and contraction. This can lead to leaks, broken joints, or even pipe failure over time.

In this case, 12 feet is considered a balance between allowing flexibility for thermal expansion and maintaining structural integrity. Other distances listed do not adhere to the standard practices recommended by industry guidelines such as those from the Copper Development Association. Proper spacing ensures not only the longevity of the piping system but also optimal performance throughout its service life.