Do you think this is sufficient?

I have attached a drawing (part borrowed from another post) to show what I have planed.
I have a toilet and was wondering if it needed a vent? It goes down just below the floor joist and bends to a horizontal line that I want to have a 2" "Y" connecting a tub/shower with a 1-1/2" vent on the far end next to the tub. The 3" line also has a 2" "Y" connecting a washer drain that comes down to it that also has a 2" vent on the top end of it, Does this look to be ok? Does the toilet need it's own vent? The full 3" length of the line starting with the toilet to the bend to go to the sewer is approx. 7 or 8 feet.
All info on this would be greatly appreciated.

Thanks,
Ron

You can't wet vent a washer or anything other than a bath group for that matter

Tom Sawyer said:

You can't wet vent a washer or anything other than a bath group for that matter

Click to expand...

I might not have said that part right. The pipe goes up from the 3" to a Sani-T straight up to the roof. Off of the Sani-T is the trap that goes to the washer stand pipe. Would this be OK? How does the rest look? I have attached a picture of what the standpipe would look like above the floor with the vent.

Thanks,
Ron

The washer picture is correct. Do you have a lav. sink somewhere? And you probably need to factor in a cleanout on the 3"

Thanks jimbo, The lav sink connects to the 3" pipe as it is going to the sewer with it's own vent. Actually were in my picture above when the 3" 90's to the sewer there is a cleanout there . The 90 is a combo Y with the cleanout plug on one part of the Y.

Does everything look OK with the rest of my first picture? I did not know if I needed a "main vent" going to the 3" for the toilet.

Edit... I have attached new picture showing cleanout.

Thanks,
Ron