Terry, I just bought a 2 story house, been here for a week and half, took a long hot shower downstairs in master bath and before I was finished it started smelling like sulfur or sewer. Been having alot of rain and we have a septic system. The master tub drain downstairs wasnt plumbed in and I had just done that today before showering, but i didnt put a p trap inline. Could that be the problem with the smell?