Started when we had a clog and we used a plunger to unstop it. Few weeks later when you flush and the water goes down the drain sounds very loud like a water going through a tunnel. Kind of like a frieght train. The house was built in 1993 on slab here in Florida. This just started a couple of weeks ago. No backing up no noise from the water tank just when the water goes down the drain.

Greetings from Sarasota, Are there any bubbles after you flush? Do you have a closet auger,(see image)? What's the tank level? Can you lower it down a bit so there's not so much volume going into the bowl? Back to you, Tom

Thank you for getting back to me so fast. There are no bubbles after the flush and I do not have a closet auger (although I can pick up one at Home depot). Do you think there is a stoppage somewhere in the piping? The tank level is full and will try to lower it tonight when I get home. I guess that means to try not to full the tank up so high? I am trying to attach a video of the tank flushing the heavy breathing is my dog lying next to the toilet sorry.

<embed width="600" height="361" type="application/x-shockwave-flash" allowFullscreen="true" allowNetworking="all" wmode="transparent" src="http://static.photobucket.com/player.swf" flashvars="file=http%3A%2F%2Fvid7.photobucket.com%2Falbums%2F y276%2Fshirl51%2Ftoilet.mp4">

http://s7.photobucket.com/albums/y276/shirl51/?action=view&current=toilet.mp4

What's different about the sound it makes now compared to the sound it used to make? I asked about the toilet auger because it's better then a plunger. A toilet auger can auger into a solid clog and bringh it back where a plunger can't. Back to you, Tom

The sound before was more quieter like normal toilets. You flush water goes down and that's it. Now its like glug glug through the pipes. I can definite hear a difference through the walls.

I should probably say sounds like tornado going through the walls. Much louder than normal.

Purchase a closet auger and auger the bowl. There may be something down there that's disturbing the flush. Let me know how you make out. Good luck, Tom

Hi When I went home last night I was in this bathroom and my husband in the other one way down the hall. He had flushed the toilet and I heard the rumbling again in my bathroom behind the walls. So I am thinking its not the toilet at all. Any suggestions what it could be?

Any suggestions what it could be? This is just a guess. I suggested a closet auger because I thought there might be something in the bowl that disturbed the water as it drained past. Now I'm wondering if it isn't farther on down the line in your pipes. You could pull the closet toilet nearest to where you heard the "rumble" and send a sewer snake down the open toilet hole. My gut tells me there's something caught up down there. Let me know what you find. Good luck, Tom