Hi Theo - I should have mentioned that same problem when I found it in mine. Did not have a screw protrude through but did have a kink when slid out. We were having an issue with the fridge not working on propane all that good but thought it was the fridge itself. Didn't really think much about it. I had reason (explain later) to remove the table and seats and install a second floor to make it more rigid (and to cover up the table pole hole) and that's when I saw the hose kinking where it comes out of the hole in the house floor. It was a plastic/rubber hose that, when extended, folded over. I figured that it could possibly split from the constant movement so I checked with a plumber friend and he assured me that this hose is designed to withstand that type of mishap. I trust him but could not help but replace the hose. I went to Home Depot and found the same size I.d. Gas grille hose with fittings on each end. I think it was 8' long. I then went over to the section where they have brass fittings and found a barbed fitting to go I to the original hose, an elbow to attach to that and then attached the new hose to the fitting. Easy enough. Then I positioned the new hose assembly under the slide out floor so it would coil out and back when operating the slide. I then attached a short section of piping to the hose with fittings and mounted it to the slide out floor with clamps typically used for mounting conduit to a wall. Then the copper tubing from the fridge attached to the pipe. All fittings were sealed with Teflon tape made specifically for propane/gas connections - it's yellow. Several checks proved the coil worked great without kinking during slide operation. My heater was moved to the other side of the rig during the reno so there was no impact to it, but the connection type is the same if your heater is still on the slide.
So the reason I had to go through the removal of the new seating and table and add a second floor surface- the dope that did the install for me messed up badly attaching the table bracket to the wall with just #6 self tapping screws into the 1/8" panel walls. He didn't even hit a "stud" with any of the screws he put in and the table loosened up during travel. I came up with a plan to install a second layer of wallboard, wainscot panels actually, onto the existing panel to give me at least 3/8" wall to mount the table bracket to a more solid surface. I used construction adhesive on the wainscot and constructed bracing to go from the right side solid wall to the left side slide out moveable wall and used the power of the slide to bring it all in and apply pressure while it was drying. I left it there for a few days to be sure it set up good. Then I added a "chair rail" at the top of the wainscot using adhesive and many brads at many angles to keep it attached. Caulked and painted to match and it looks like it was there from day 1. I installed a new carpet on the slide, which is now 3/4" higher than before but does not crate a trip issue or anything and feels so much more solid. Reinstalled seating and and attached table bracket to the wall with butterfly anchors to be sure it won't pull out again.
It seems like it was a lot of work but it really wasn't. After going through all that I had to stop and ask myself why I paid someone to do this. I certainly could have done it myself the first time around and not have had to deal with the inadeqacies that the shop, who specializes in rv's, apparently had. Stupid stuff!
I do love our new seating and sleeping arrangements as do our kids and/or guests.
