No Roof Vent

[MichaelAR]

Hello, my name is Michael and I own a small 600 square foot house which has 1 bathroom the past 6 months ive been having issues with my toilet gurgling when the washer is on the drain cycle this mostly happens after a rain storm but now when I flush the toilet it backs up and a slow flush happens and the bathtub and toilet is now starting to gurgle way more. As looking around on Google it's a vent issue and there is no vent coming from the roof, the plumbing in the crawl space seems to be done cheaply. I'ma create a diagram later on but I'ma tell you what is looks like. The kitchen sink, washer drain and the bathtub drain all go into the main pipe that leads to the septic tank but the bathroom sink has a pipe that leads to the main pipe but a 5½ pipe sticks up from the bathroom sink pipe and has a s trap that is wide open. Could this be the make shift venting system? I might upload a picture later on but it is so weird.

 

[Terry]

You could have a venting problem, but if the toilet is backing up that may be a sewer line issue. It sounds like the tub isn't backing up though.
They should have vented through the roof on that at least once.

 

[Sponsor]

 

[MichaelAR]

By backing up I mean when I flush the toilet tbe bowl fills up and slowly goes down. could it be a venting issue? I don't see a vent other than what I mention about that picep of pipe.

 

[hj]

Vents ONLY create a flushing issue when the drain line is ALSO blocked.