I think the deepest my wading pool ever got was about 1/2 inch
My previous chassis did not have very well sealed floor panels and always let water in from underneath, but also allowed it to drain when driving in really heavy rain. The new chassis seals way better, as evidenced by the near inch of water swilling around the passenger side after Day 2 of our trip to Wales last month. I am looking to drill some holes in the floor to allow it out again, as it took an age to dry out properly.
