What is a common method of minimizing infiltration and inflow (I/I) in a collections system?

Regular inspection and sealing of joints and manholes is a common method of minimizing infiltration and inflow (I/I) in a collections system. This practice is essential because joints and manholes can be points where groundwater and stormwater enter the sewer system, leading to excess flow that can overwhelm treatment facilities and lead to costly operational issues. By regularly inspecting these critical points, any potential leaks or cracks can be identified and repaired promptly, greatly reducing the likelihood of I/I.

Effective sealing of joints prevents both infiltration from the surrounding soil and inflow from surface runoff during rainfall. This proactive maintenance strategy helps maintain the integrity and efficiency of the sewer system, ultimately protecting against the environmental and financial impacts of I/I, which can include improper treatment and increased treatment costs.

Other options, while they may offer some benefits, do not target the issue of existing leaks as directly or effectively as regular inspection and sealing.