CCTV (closed circuit television) is a very useful tool for the drainage engineer as most drains are either concealed within the building or underground.
http://www.jandpplumbing.co.uk/cctv-drain-surveys/
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CCTV (closed circuit television) is a very useful tool for the drainage engineer as most drains are either concealed within the building or underground.
http://www.jandpplumbing.co.uk/cctv-drain-surveys/