Exactly why I immediately throw out the “Bushart Theory” of the extra weight of the “10 gallons of water” in the pan. That ain’t squat compared to an adult human male. I have personally tested showers that when weight was applied, the pan seperated fron the drain. Wasn’t much, but was enough to cause a leak. And no, the extra weight of the water in the pan “did not” add enough weight to open the leak.