How to reduce inflow and infiltration in a wastewater network

Stormwater ingress to a city’s sewer system through low gully traps, illegal connections, broken pipes or unsealed manholes is known as Inflow and Infiltration (I&I). This can cause overflows, system strains and interruptions.

What is Inflow & Infiltration? 

Inflow: Stormwater that enters the wastewater network directly through gully traps, roofs or illegal connections.

Infiltration: Stormwater or groundwater that enters the wastewater network through cracked pipes and leaky or faulty manholes.

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