Inflow and Infiltration

Detect leaks in pipe joints and manholes.

What's the problem?

Storm or sewer pipes performing past capacity? Detect inflow and infiltration due to excess was entering underground systems.

inflow and infiltration diagram step assess subsurface features

Addressing even the smallest leaks in your system can generate significant savings. Groundwater seeps into sewer pipes through, cracks, leaky pipes and joints, as well as deteriorated manholes.

Stormwater can reach levels that will place great strain on sewer pipes, manholes, and catch basins. Inflow enters the sewer system through illegal connections including basement sump pumps and foundation drains.

inflow and infiltration diagram step manhole imaging

Flow monitoring measures the system’s wastewater flow compared to the baseline flow estimate. Slow joint or manhole leaks cause high repair costs. Flow monitoring can detect thousands of gallons wasted annually if not fixed. Stop inflow and infiltration at the source.

Flow monitoring uses equipment to read and record flow depth and rate to determine if issues are resulting from inflow, infiltration, or both. Using the data gathered, it’s possible to plan and design a sanitary sewer rehabilitation approach to correct I & I issues at targeted locations.

inflow and infiltration diagram step flow monitoring

The manhole inspection equipment at Trinity Subsurface, LLC captures a 360-degree scan of the manhole wall. The system measures manhole depth, lowers the probe accordingly, and then assembles scan data for instant viewing. The camera observes any structural defects.

With the press of a button, our manhole imaging tools perform a rapid, high-res, fully automated manhole inspection. A dense point cloud is produced that can be easily merged into any CAD or 3D application.

inflow and infiltration diagram step video pipe inspection

Video pipe inspection televises sewer line/laterals and mark defects including cracks, leaky pipe joints, and deteriorated pipes in real-time.

Reducing and eliminating I & I helps prevent sanitary sewer system overflows that result from system overloads. Overflows can cause water quality problems, property damage, and put public health at risk from back-ups in properties and the release of untreated flow into rivers, lakes, and streams.

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Reduce collection system overflow by detecting excess ground and stormwater.

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Trinity Subsurface wants to send you a Manhole Imaging report to show you how user-friendly our deliverables are for project managers, engineers, and foremen alike.

trinity subsurface manhole imaging report easy to read and quality data
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Next step: repair line defects and damage.

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sectional point repair.

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Preliminary step: locate line defects with video pipe inspection.

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Video pipe inspection

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Get your questions answered


What are inflow and infiltration?

Inflow occurs when stormwater enters the sewer system through rain leaders, basement sump pumps, or foundation drains illegally connected to the sewer.

occurs when groundwater seeps into sewer pipes through cracks, leaky pipes joints, and/or deteriorated manholes. It is most common after a storm due to a rise in groundwater.

What are the possible next steps for I&I treatment?

After problem areas are identified there are several ways to combat inflow & infiltration including:

- Isolate High I&I
- Replace Covers
- Manhole Sealing
- Fix Cleanout Caps
- Elimantion Cross Connections
-Section Point Repair

Will I&I cause long-term damage?

35% of the water entering a water treatment plant is I&I. The treatment of I&I can lead to significant savings on your property or construction site. The detection of slow leaks at pipe joints or within manholes can cost thousands of dollars in water usage over one year.

I&I can cause long-term damage by exceeding pipe flow capacity. Abnormal wear and tear can cause full pipe breaks.