@your_favorite_contractor: How to find a plumbing leak using a fog machine. So this is the first time I ever did this and it actually worked out really well. We were able to see where all the fog was coming out. There a hole in the floor and then we chased that hole into a wall cavity where we found an old p-trap from a laundry that used to be there that they never capped. So we were able to cap that and then put everything back together. So no more sewage smell! #HomeImprovement #DIY #construction #builder