Limiting sewer line inflow and infiltration requires a dedicated maintenance program and tools that can assess pipe condition and note areas of concern. Cameras, smokers and locators might be ways to identify leaks, but are these tools every utility should have in its toolbox?Yes and no, says Duane Johnson, vice president at Affordable Pipeline Services in San Diego and a former CCTV inspection operator and flow monitoring field technician.“What it really comes down to is agency size,” he says. A smaller utility with limited staff might be better off outsourcing its leak detecting, whereas a larger utility with a 20-member
