storage tubes
You can go to many rv stores, I know at least Camping world, and they make different lengths of the storage tubes like Heartland places on the frame. Of course you could probably make one much cheaper by going to your local home improvement store and buying some PVC pipe and end caps. I just bought a Sundance and it has the small tube mounted under the TT on the frame and it is only for a 10' hose. I probably make a longer one. You sound like me though, I don't want a nasty sewer hose inside my storage compartment areas or in my TV.