CCTV Drain Inspection

Because drains are largely hidden from view, the exact cause and nature of the problem may not be immediately apparent. That's why inspection and diagnosis are crucial features of the Dyno-Rod service.

The Need For A CCTV Survey

With the passage of time and usage, drains and sewers can deteriorate. It may take several years, but drains can suffer as a result of many factors such as ground movement, poor construction, tree root invasion etc. The Dyno-Rod CCTV survey is specifically designed to investigate a drain's condition for the following reasons:

Problem Solving - Sometimes, nothing less than a visual assessment of a problem will meet the need. In such cases, television provides the full picture. CCTV surveys of drains, pipes, and sewers provide an accurate and cost effective way to detect problems to the source and help establish the most practical remedial options.

Problem Prevention - When problems with drains or pipework are to be avoided at all costs, CCTV enables potential faults to be identified before they become a problem. For further details see Avoiding drainage problems.

Property Pre-Purchase Surveys - Rectifying structurally defective drains can be expensive so, if buying a property, it is recommended that a CCTV inspection is conducted to establish their condition as part of a pre-purchase survey.

The CCTV Surveying Process

A CCTV Survey can be carried out with the minimum of fuss and disruption. The process is as follows:

STEP 1
Camera Inserted into Drain

The CCTV camera is introduced into the drain via the appropriate access point and pushed or powered through the pipe.

STEP 2
Operator Observes & Records

As the camera travels along the pipe, the image is relayed to a monitor screen above ground. The operator will then log any structural defects and record the location of each along the pipe length.

STEP 3
Survey Report Provided

The survey report is then provided which lists the type and location of any defect. This can be backed up with photographs, video or CD evidence together with a site plan showing the drain's location. View an example CCTV survey report

Structural Faults That CCTV Can Reveal

There are many different types of structural defects that can occur in underground pipework. Some examples are pictured below.

$Defect: fractured pipe$ Defect: fractured pipe
Cause: Pressure above ground
Consequences: Cracks or fractures in drains leak water which destabilises the surrounding soil. This will result in further damage to the drain and even subsidence to buildings near by.

Defect: collapsed drain
Cause: Several possible causes
Consequences: Drain becomes unusable with high likelihood of frequent blockages, environmental damage, and building subsidence.

Defect: tree roots
Cause: Roots seeking moisture
Consequences: Materials flowing through the drain will snag on the roots causing continual blockages. Roots dislodge or crack the drain resulting in leakage and further damage.

Drain Layout And Location

If CCTV reveals a structural fault, its exact above ground location can be pinpointed using sonar tracing equipment. This is often used to verify the position or even the existence of underground drains, utility lines or buried manholes. Enabling the provision of accurate drain layouts, sonar tracing is the ideal solution when site plans simply aren't available.

CCTV Survey Request

Request a CCTV survey. For further information e-mail Dyno's Customer Service Centre.