I am not a plumber but I have been through the ringer with a bathroom remodeling. After firing first plumber, remodeling company hired a second company to correct wrongly installed piping. All was completed but we had low water temperature in the shower, we had been using the shower for two weeks. The second plumber returned to adjust the shower temperature. After taking a shower water started leaking into the kitchen below the bathroom. My question is there anyway that adjusting the shower temperature could cause the water leak?