The distance between clean outs on horizontal waste lines larger than 2" shall not exceed?

The correct answer is 100 feet because building codes and plumbing regulations dictate that the distance between cleanouts on horizontal waste lines larger than 2 inches must be within specific limits to ensure effective maintenance and access for clearing blockages.

A distance of 100 feet is established as a standard to provide sufficient access points to allow for as-needed inspection and cleaning without requiring extensive dismantling of the plumbing system. This standard ensures that a cleanout is available relatively nearby if a blockage occurs, facilitating timely maintenance and reducing potential plumbing issues.

In contrast, shorter distances may not provide enough access points, while longer distances could create challenges in maintaining the waste lines effectively. Therefore, the 100 feet guideline balances the need for accessibility and practicality in plumbing maintenance.