How far apart must cleanouts be provided for horizontal drains within buildings?

The requirement for the spacing of cleanouts in horizontal drains within buildings is crucial for ensuring effective maintenance and access for clearing blockages. According to plumbing codes, cleanouts must be positioned at intervals that allow for easy access throughout the drainage system.

When considering the spacing, the correct distance is 100 feet for horizontal drains. This distance allows for comprehensive access in case of a blockage, minimizing potential complications that could arise from excessive length without proper access points. Adequate spacing is vital for maintaining the health and functionality of the plumbing system, ensuring that any obstructions can be addressed efficiently without requiring extensive invasive procedures.

Plumbing codes typically specify this 100-foot requirement based on the assumption that it balances practical accessibility with structural considerations, making it the standard in the industry.