We called this sewerpipe, it is located west of the rivermouth at Thurso. There is a pipe that runs on the beach here. Real nice rollercoaster right, runs forever and holds good size.
A super fun wave, it bowls around the reef towards the harbour making the long rights break diagonally towards the beach. On a good swell it sometimes becomes quite hollow. I've never had a more fun than when I was surfing this wave, it made up for all the nailings I got at the East. Get out there and check it out for yourselves!
coldswell.com