How does a CCTV Survey work for blocked drains

19 Jun How does a CCTV Survey work for blocked drains

A CCTV (Closed-Circuit Television) survey for blocked drains is a process used to visually inspect the inside of drainage systems using specialized cameras. It allows drainage professionals to assess the condition of the pipes, identify blockages or damages, and determine the appropriate course of action for repairs or maintenance. Here’s how it typically works:

Preparations: The drainage engineer will locate the access point to the drainage system, such as a manhole or an inspection chamber. They will remove the cover and prepare the CCTV camera for insertion.

Camera insertion: The CCTV camera, mounted on a flexible rod or cable, is carefully inserted into the drain or sewer pipe through the access point. The rod/cable is gradually pushed or pulled through the pipe, allowing the camera to capture footage of the interior.

Video inspection: As the CCTV camera progresses through the drain, it records high-quality video footage in real-time. The camera is equipped with powerful lights to illuminate the pipe and provide clear visibility. The video feed is transmitted back to a monitor, allowing the engineer to observe the condition of the drain.

Analysis and diagnosis: The drainage professional closely examines the live or recorded footage from the CCTV survey. They look for various issues, including blockages, cracks, fractures, root intrusions, collapsed sections, or any other abnormalities within the drainage system.

Reporting and recommendations: Based on the findings of the CCTV survey, the engineer generates a detailed report. This report includes information about the condition of the drain, the location and extent of blockages or damages, and recommendations for appropriate remedial measures. This could involve drain cleaning, repairs, relining, or other necessary actions.

CCTV surveys are highly effective in identifying the cause and extent of blockages in drains without the need for invasive exploratory work. They provide accurate and visual evidence, allowing for targeted solutions to rectify the issues and ensure the smooth functioning of the drainage system.