Well it depends on who you ask. Some people don't like the looks of them and some do. I've always set whatever camper I have at the time up to fit me; not anyone else. That being said; when I bought my Scamp
19 I took the old short tube off because it was a yellow color from fading. I re-mounted it under the unit near the back for a short hose. Then I bought a long tube and a short tube and installed them on the front. I will use one short one from the black tank and hook into the other short one coming from the gray tank with a Y tee and use the long one going from the Y to the dump. Here is a picture of my two mounted on the front. Not a great angle for the picture but its the one I already had on photobucket.