phranc,
The tube is an
EZ-Hose Carrier from Camping World. It's the long one. I am using it for a long sewer hose. The tube I.D. is large enough that I can keep the sewer collar on it all the time. The mounting flange on each end as well as the end caps with tethers come with it - fully assembled. You can make one much, much cheaper using stuff from the home improvement stores if you can find all the parts you like. I did look once too but didn't find all that I'd need. Rather then drive to several stores, I went the easy route and got this unit all ready to roll!
Ideally, I'd like to relocate this to underneath the trailer to keep all dampness (and potential yuck!) out of the storage area. I do rinse my hose out well before putting away but let's not kid - it isn't really sanitized! And when you're in line at the dump, you don't have time to let it drip dry all the way. On the off-door-side of the tube mount, I dropped it down using a piece of scrap wood (1-1/4" square) from the build-up frame from the storage tray. This way it has some slope to it and will drain. If need be, I will place a towel on the floor of the compartment.
Funny you mention the ladder. I have considered putting a folding ladder in one of these tubes. But I ended up getting a 7 foot folding ladder and it is too long for the longest EZ-Hose Carrier. Though I could make my own I guess. Would need a special end with holes for draining. Not sure if you can see it but I have the ladder all folded up on the sliding storage tray toward the front.
Jim