We have a 26ft 1991 Voyager. We travel 6 months every summer. We are in New Mexico right now and noticed water coming up between the planks of the replaced flooring. By power of elimination we figured out it was coming from the shower. Couldn't find any cause, so found a great article online - I will provide the link - that helped you troubleshoot RV shower leaks. Long story short, we had a big buildup of hair down the drain. This cause enough pressure on the pipe that it leaked. Removed the buildup and no water leak! I just had to share after using this site often for words of wisdom and encouragement. We love our HiLo and are surprised when people ask us why we don't get a newer trailer. 🙄 Lol
https://rvgoer.com/rv-shower-drain-leak/