blue hill
Member
Hi folks,
New member here.
We recently renovated our basement and added a bathroom. Now I notice that whenever the upstairs toilet is flushed, the basement toilet bubbles up (air) and it bubbles up quite violently if you flush the upstairs toilet several times in a row. The water in the basement shower drain P-trap moves, but not significantly. The toilets are not connected to a common vent, the basement toilet stack is vented with an AAV in the joist space.
Both toilets are American Standard Champions but purchased several years apart.
Thanks in advance for your help.
New member here.
We recently renovated our basement and added a bathroom. Now I notice that whenever the upstairs toilet is flushed, the basement toilet bubbles up (air) and it bubbles up quite violently if you flush the upstairs toilet several times in a row. The water in the basement shower drain P-trap moves, but not significantly. The toilets are not connected to a common vent, the basement toilet stack is vented with an AAV in the joist space.
Both toilets are American Standard Champions but purchased several years apart.
Thanks in advance for your help.