CCTV survey of foul water sewer in Newnham near Daventry.

Lowering the crawler into the channel.

The crawler about to set off up the pipe. We had no access to the upstream manhole. The sewer is 300 dia laid at 1:750 gradient. This meant a high water level and unknown quantity of 'sludge' in the pipe. This stopped the crawler after 20 metres unfortunately.