Video Pipe Inspection

Underground Sewer, Storm & Pipe In-Line Crawler Services


VPI / CCTV / Crawler Services

  • Robotic crawlers are used for larger pipes over 6” in diameter. The remote control crawler camera can travel up to 1000’ from an access point.

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Push Cameras Services

  • A push camera is used for pipes measuring between 2”- 6” in diameter. A push camera can travel 150’-175’ down a utility line from a single access point.

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Lateral Launch Services

  • Cross bore mitigation investigation usually is needed when there’s an intersection between an existing underground utility and a second utility that results in direct contact between the utilities.

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  • Brick Obstruction

    Brick Obstruction

  • Cone Obstruction

    Cone Obstruction

  • Gravel Deposit

    Gravel Deposit

  • Root Ball

    Root Ball

  • Video Pipe Inspection is a service used to inspect underground sewer pipes and lateral pipelines. Within VPI we offer the robotic crawler, push camera, and lateral launch. Here are some common problems that can be seen after a CCTV pipe inspection:

GPRS Overview Of Video Pipe Inspection

Video Pipe Inspection Case Study

GPRS will get requests for video pipe inspection to assess different pipes and is instrumental in inspecting sewer service laterals. The one screen picture in picture will give you all the information you need for mainline and lateral viewing. If you would like to learn more about the value of video pipe inspection please take a look at a recent video case study.

Video Case Study Notes:

Results - We were pushing smoke into the storm lines and the smoke was coming out of a known sanitary manhole nearby. We then placed the smoke machine on a sanitary manhole, and it came out of the storm manholes & catch basins in the area. To figure out what was going on, we used our robotic crawler and inspected the storm lines while blowing smoke into a sanitary manhole. We ended up finding that they had a sanitary channel built into one of the storm lines at a higher level. ​

The picture below is the camera looking up at a manhole lid while inside the storm system. The brick on the right had a sanitary channel built into the top of the brick structure. When we blew smoke into the sanitary manhole, we could see it coming from the top and towards our camera in the storm system. This manhole was buried under asphalt so we could not open it to get pictures of the setup from the top.​

This helped the customer in 2 ways. ​We found a buried manhole that the customer did not know existed.​ This could have become a big problem down the road. If the sanitary line backed up at any point it would flow over the channel wall and into the storm system. This would eventually pollute the rivers nearby with sanitary waste.

San channel in a storm line


  • GPRS was great to work with! When we started on this project, all we had was City records of a large combined sewer line and an approximate location from our surveyors. We had GPRS use their technology to confirm the location and what they found was crucial in moving our design forward. Even the City has since praised them for providing the information and allowing them to accurately update their model."
  • -Jessica H, P.E., Kimley Horn

What is Video Pipe Inspection?

Video Pipe Inspection is a method of using video to visually inspect a utility line for cracks, infractions, blockages, and other imperfections in the line. The process involves navigating a video camera through a utility line, either manually or via a remote control, which provides a video feed of the pipe’s interior to an on site monitor for viewing.

How Does Video Pipe Inspection Work?

The first step to performing a CCTV pipe inspection is to find the access point where the camera can be lowered into the utility line. Once the camera is lowered into the line, it can give a very clear picture of the condition of the line and what the inside of the utility looks like.

Why Do We Use Video Pipe Inspection Work?

There are typically four main reasons why someone uses VPI. The main uses for VPI include non intrusive inspection of pipes and conduits, discovering unknown laterals and tie-ins, identifying problematic areas caused by deterioration or poor construction and to locate other unknown blockages. The value of using it can help customers deal with damaged sewer lines and the repairs can focus on those damaged sections only, which in the long run will reduce the cost and time it takes to fix the pipe.

CCTV Company Contractor

CCTV Company Contractor

In-Line CCTV Crawler Lowered into Sewer

In-Line CCTV Crawler Lowered into Sewer

CCTV Pipeline Inspection of Eight Inch PVC Sewer Main by the Nation's Leading GPR Company

CCTV Pipeline Inspection of Eight Inch PVC Sewer Main by the Nation's Leading GPR Company




Root Ball Obstruction

Root Ball

Root Ball Obstruction


Roots Coming in Through a Hole in the Pipe


10FT Corrugated Culvert Nearing a Collapsing Point


A Tap Installed Too Far into the Main Line


48 Inch Corrugated Steel Pipe Found Collapsed by Robotic Pipeline Inspection Equipment


Found Out Why This Water Line Butterfly Valve Wouldn’t Close


Pipe Fractures at a Joint Discovered by CCTV Pre Inspection


Geode Map of Storm and Sanitary Sewer at a Mall in Las Vegas, NV


Storm and Sanitary Sewer lines located and mapped at campus in Santa Clara, CA


Buffalo Manor West & East Map

Case Studies


A customer recently had a pothole surface in their parking lot. The customer was not sure what the root cause of the pothole was and decided to call our CCTV inspection services department to use the cctv robotic crawler system in the surrounding storm pipes.

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A customer was not sure at what point the storm pipes made a turn and need help locating it. The customer hired our CCTV camera inspection services department to use the robotic crawler camera system to determine where the turn was.

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A valued customer was having flow issues within their waste pipes and was not sure exactly where the issue was occurring. The customer hired our CCTV camera inspection services department to use the robotic crawler camera system to determine where the issue was.

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CCTV Inspection - GPRS

GPRS was contacted by a local contractor in Southern California that had a problem that needed solving. They had a project at the Buckley School in Sherman Oaks, and they needed to determine where the main storm sewer line was running along with the location of any taps in the work area(s). This might seem like a pretty simple project, however, the storm sewer pipe is a 51 inch RCP (Reinforced Concrete Pipe) and it is roughly 20-25 feet deep.

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Many cities and counties around the US have started requiring pre and post inspections of storm and sanitary sewer lines if any work is taking place near those utilities. GPRS was called out to a residential build, where a swimming pool was being constructed near the city sanitary sewer line. The purpose for the pre and post inspections is to determine if there was any change in the pipe condition before and after the construction takes place.

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NASSCO is the National Association of Sewer Service Companies. NASSCO sets industry standards for assessing, maintaining, and rehabilitating underground infrastructure. Two training programs are used to certify those who are performing pipe inspection work. The Pipeline Assessment Certification Program is the North American Standard for pipeline defect identification and assessment. NASSCO’s Inspector Training and Certification Program is the standard national training and certification program which provides field construction professionals with comprehensive learning and tools to understand and inspect trenchless pipeline renewal technology.