Right, the intake tube needs to align with a scupper for it to work. It just happens to work in the thresher.
If you know anyone who has a hobie bait tank try to see if it'll work. The stock intake tube is long enough to get into the water
So the Hobie can work in other kayaks under the right circumstances. I was pleasantly surprised that it worked in both because I like the Hobie tank. Hopefully this helps