Doors and Windows - Water-Tight Doorway

Question: Is there any way to make the bottom half of a doorway water-tight when the door is shut?
Background: Just purchased a ground-floor condominium. While not home the sewer backed up, the toilet overflowed, and sewer water flooded the bathroom, hallway and one bedroom. Carpet ruined. Plumber came. "Is there any way I can avoid a repeat of this?" I asked. "No," he replied. "Is there any way I can avoid a repeat of this?" I repeated. "No." "Is there any--" "NO!!!" I called the property management company. People put stuff down the sink, etc. that they shouldn't...therefore I (and other ground-floor condos) have this problem. I can't make people behave. So is there any way I can make it so that when I shut the bathroom door no water can flood the rest of the condo?

I'm not a plumber, but I would look into installing some type of flap-type check valves in all my drain lines. Then the sewer water couldn't back up into YOUR fixtures and condo. Good Luck!

The Old Guy is right. Install a check valve in your sewer line. they cost about $75.00, and have a plumber insatll it. They were invented to avoid just the problems you have experienced. Now, think about this. suppose you have a water tight door. the toilet over flowed, the door held the water in until you opened the door. Now, you would be ankle deep in what ?

Jack and Old Guy are right. One more problem you would have is not getting any return air from the bathroom area.

The Old Guy, Jack, and R.L. Boatright are all right. Besides, water tight doors are damned expensive -- just ask the Navy!!