We recently moved into a brand new house and when ever the washing machine or the bath tub drains, the two toilets I have down stairs bubbles. we also have a a toilet upstairs but it is not affected. It appears that only the upstairs toilet is vented through the roof . The only vents I can find down stairs are under the sinks, The builder told me that because we have load bearing walls he could not put in the typical roof vents , and had to go with the under the sink type vents. does any one have any ideas on what can be done to fix this problem? I have made several calls to the plummber that installed everything , but has yet to return my calls. I just want to get more info on this issue so i know if he is telling truth when and if he comes to fix it.

The under the sink vents are perfectly legal and do the same thing as the roof vents, if they are placed in the right area. Keep trying your plumber to see if they were installed right.

What you can also try is remove one of the vents in the problem area for a few minutes and see if the bubbling still happens.

Thanks for the input Adam , I will try it.

quote:

Originally posted by Adam B:
The under the sink vents are perfectly legal and do the same thing as the roof vents, if they are placed in the right area. Keep trying your plumber to see if they were installed right.

What you can also try is remove one of the vents in the problem area for a few minutes and see if the bubbling still happens.

Hi, Adam,

I tried what you suggested, I removed one of the vents closest to one of the toilets when it was bubbling. When I removed it had quite a vacuum on the line, and the bubbling disipated. Does this mean that I need a bigger vent?

You might have a defective vent. Bring the vent to a hardware store and buy another one. It doesn't have to be the same one but just make sure the size of the pipe is the same, which is why you bring the old one to compare. Its either going to be 1-1/2" or 2". A oatey is a quality vent but they may not have them.