What is wrong with this bathroom vent

[Rsmith02184]

Hello

I did my own plumbing. I bet many of you hate that. But the plumbers were too busy. I vented the bathroom vanity and the toilet together Both “vents” connect to the drain line which eventually connects to the main stack. But the vent I installed does not connect directly to the stack. What problems will I encounter? P-trap on the vanity being siphoned off when I flush the toi

 

[WorthFlorida]

.........Both “vents” connect to the drain line which eventually connects to the main stack. But the vent I installed does not connect directly to the stack............

What does this mean?

Pictures please, need to be sure the fitting are in the proper position.
How far is the. Sink trap to the vent? Any fixtures above the main stack? Where is the roof vent?

https://www.co.lincoln.or.us/DocumentCenter/View/961/2015-Plumbing-Guide-PDF

 

[Sponsor]

 

[John Gayewski]

We need a diagram to see what your talking about.

 

[WorthFlorida]

Vents go horizontal and up. The vent should not more than about five feet from the trap. When you say the vents connects to the drain but not the stack, sounds like it all not correct. Read the link in placed in the previously post. Good information Especially on venting. Venting is really the hardest part to learn in plumbing when working with old work.