When approved manholes are installed instead of cleanouts, what is the maximum distance allowed between manholes?

The maximum distance allowed between approved manholes when they are installed instead of cleanouts is 300 feet. This standard is set to ensure that access points are sufficiently frequent for maintenance and inspections of the drainage system. Manholes serve as access points for cleaning, inspection, and repairing the sewer system, and having them spaced too far apart could hinder effective maintenance.

The 300-foot requirement balances the need for accessibility with the practical realities of underground installations, helping to minimize the risk of blockages going unnoticed for extended periods. Additionally, if the distance between manholes were to exceed this limit, it could create challenges in detecting and addressing issues within the system, potentially leading to more significant problems down the line.