What is the maximum allowable distance for a cleanout in vertical stacks?

The maximum allowable distance for a cleanout in vertical stacks is established to ensure that blockages can be efficiently cleared and to maintain proper system functionality. The correct answer indicates that cleanouts should be accessible within a distance of 30 feet when it comes to vertical stacks. This guideline is critical for maintaining the plumbing system, as it allows for easy inspection and cleaning of the stack, which can prevent the buildup of waste materials and potential clogs.

In general, plumbing codes are based on the need for accessibility and efficiency in maintaining the integrity of the drainage system. If cleanouts were allowed at greater distances, it could lead to difficulties in reaching and cleaning out blockages, potentially causing serious plumbing issues. Cleanouts are essential features in a plumbing system, functioning as entry points for clearing obstructions and performing maintenance. Thus, adhering to the specified distance helps uphold not only the performance of the plumbing system but also health and safety standards.

This standard of 30 feet is set to ensure that every part of the vertical stack is manageable and can be accessed without excessive labor or obstruction.