Just got ours today, in the rain on the way home and I leveled it put the slide out and we have no leaks.
There are limit switched on the slide that turn it off when it's all the way in or out and they are adjustable. Spent some time sorting paperwork since there was nothing else to do in the pouring rain and noticed that.
Jill & Chris, Wills (14) Evie (11) & Toby our collie (5)
2011 Grey Wolf 28BH
2013 Chevy K1500 Crew w/ Reese StraitLine Dual Cam
Nights camped 2011: 11 2012: 18 2013: 12 2014: 12 2015: 13 2016: 3