|
- over 420,000 Posts - PlumbingForum.com -
|
|
Author:
stevengould46 (NY)
I installed a new bath last year. The plumber didn't connect to the existing vent but installed a provent in the wall behind the sink. Recently, when the shower runs the toilet bubbles a lot! It seems to flush OK so I didn't think it was a drain issue. Before I open the wall, does it seem likely that the vent is bad/clogged?
|
 |
|
|
Author:
waukeshaplumbing (WI)
a AAV should have an open access...it needs to get air.
if you dont have an access hole id say its a bad sign that you had a bad plumber...there could be a few things wrong.
did you always have that shower there? was it original or did the previous homeowner add it?
|
|
|
|
|
Author:
hj
NO, you have some problem elsewhere in the drain system, and the draining water is creating a "positive" pressure which is being relieved by the bubbling. IT is a normal fault of ALL AAV's which is why real plumbers do not like to use them except in extreme situations.
|
|
|
|
|
Author:
hj
The AAV only "needs air" when the draining stops, NOT while water is running.
|
|
|
|
|
Author:
stevengould46 (NY)
The shower is right next to the toilet. The sink next to the shower too. It's a small room. The toilet bubbles UP, air bubbles, when the shower is running (after a couple of minutes, not right away). I know he put a pro-vent into the wall behind the sink. But it would seem to me that if the vent was bad, everything would drain slowly, or blurp as it drains. The shower drains OK but causes the bubbling in the toilet. There are no issues when the sink is running, just the shower.
|
|
|
|
|
Author:
dlh (TX)
if it were bad your drains would drain better if anything. they will just suck your p-traps dry
----------------------------
PLUMBERS "Protecting The Health Of The Nation"
|
|
|
|
|
Author:
hj
quote; But it would seem to me that if the vent was bad, everything would drain slowly, or blurp as it drains. The shower drains OK but causes the bubbling in the toilet. There are no issues when the sink is running, just the shower.
It seems that way to you, because you are trying to think logically without understanding the dynamics involved. You have a stoppage SOMEWHERE else, but since there is either NO atmospheric vent between there and your bathroom, OR there is one, but its connection is already under water, the air trapped in the pipe has NOWHERE to go when you start running water down the drain. The shower is adding a LOT of water, which does not happen with a lavatory, so the air has to come up through the toilet causing the bubbles. Remove the AAV, and the bubbling stops, but then you have sewer gas odors in the room. The solution is to find out WHY the sewer is flooded. One possibility would be saturated septic tank field, and if something like that were the problem, there would be NO solution other than to install a proper vent.
|
|
|
|
|
Author:
stevengould46 (NY)
Thanks. That seems logical. Finally got the plumber to return my calls and he'll revisit the job today.
|
|
|
|
