Do I need to vent or will this wet vent?

[McEnzo]

Update pics:

Finally mustered enough guts to cut main stack to plumb in the sanishower and at the same time getting rid of the old 90. This should flow better.

 

[McEnzo]

I never got to post an update, bathroom is fully functional, will be starting on main bath now.

 

[Sponsor]

 

[McEnzo]

2 other pictures

 

[McEnzo]

Question for my main bath, do I still need to vent being this near to the main vent?

 

[McEnzo]

Anyone??

 

[Reach4]

Question for my main bath, do I still need to vent being this near to the main vent?

What you did in yellow works, as long as

1. that is a vent above the yellow
2. the line is not used as a vent below the yellow.

What is that pipe doing there if it is not already being used as a vent below or a drain above?

 

[McEnzo]

What you did in yellow works, as long as

1. that is a vent above the yellow
2. the line is not used as a vent below the yellow.

What is that pipe doing there if it is not already being used as a vent below or a drain above?

The 3 inch cast you see in the picture is the vent going out through the roof, the wc is tied to that below the floor

 

[McEnzo]

Would this also work? My understanding of wet venting was all the fixtures on the same floor can use the main stack as a wet vent.