Hi,
I've got a soil pipe terminating just under my upstairs bathroom window. There's an AAV on top. Since it's been installed 2 years ago, it has been working fine until 10 days ago.
I noticed the water in the toilet would rise excessively when flushing. I first thought it was a blockage but when I removed the AAV, the water level didn't rise. So I changed AAV today to a McAlpine one but the issue remains.
My understanding is that there is no place for air to escape when water enters the soil pipe via a flush. An AAV allows air in not out, to avoid the bad smells.
So how was the toilet system working correctly all this time? How was air escaping?
How do I fix it? A normal soil pipe terminal would allow bad smell out and into the house, being so close to the window... I could continue the soil pipe so it goes through the roof and terminates above it but it will then run in front of the window. I'll still be able to open it but it will look very odd. I can't move it sideways as it is in an internal corner and the window is wide.
I've got a soil pipe terminating just under my upstairs bathroom window. There's an AAV on top. Since it's been installed 2 years ago, it has been working fine until 10 days ago.
I noticed the water in the toilet would rise excessively when flushing. I first thought it was a blockage but when I removed the AAV, the water level didn't rise. So I changed AAV today to a McAlpine one but the issue remains.
My understanding is that there is no place for air to escape when water enters the soil pipe via a flush. An AAV allows air in not out, to avoid the bad smells.
So how was the toilet system working correctly all this time? How was air escaping?
How do I fix it? A normal soil pipe terminal would allow bad smell out and into the house, being so close to the window... I could continue the soil pipe so it goes through the roof and terminates above it but it will then run in front of the window. I'll still be able to open it but it will look very odd. I can't move it sideways as it is in an internal corner and the window is wide.