you have to unscrew the bench on a 13 footer and cut the closet sealed silicone. you need a long square driver bit on the 13 since you cant get between the tank and the cabinet side. at least this was the case when I replaced the hoses on my 1986 Scamp
13. there are screws in the bench into the back wall too. Get a light
in there and wear a head lamp too. hope your 16 has more room in there than my 13 did.