titleist1 wrote:Your vent air for quick flushing comes from the vent pipe that is supposed to be close by the toilet.
It's about 2 feet from the toilet, my point about the vent in the septic is you have water going down the line to tank that need to displace air in the tank. There is no for that air to go except back up the sewer pipe.
There should always be an air path to the roof stack from the septic tank through some pipe path since usually there are multiple vent pipes in a house going to one stack through the roof.
I only see one pipe going into the tank.
Forgot to mention we fusdhe the toilet with the lid off a few times and didn't make a difference....
Here's a picture, each of those boxes on the upper sides of the wall are pipes exiting the house, there is one behind where I'm at too. I think the reason they did 4 vent stacks was so they could make straight runs through the joists. We're going to dig out the last one see where it goes, that's for the grey water in the bathroom.