I'm under IRC codes here and trying to understand this before dealing with the county so looking for experience and opinions.

IPC states no heel-inlet quarter bends with a toilet but I found examples on the net showing it. Any examples prohibiting it with IPC always show heel on the horizontal. The wording in the code says no heel-inlet quarter bends at all but is it enforced just on the horizontal? As an alternative is there a big difference using a san-tee and reducer instead? (I don't have much room so prefer the ell)

Lower left figure is what I want to do with wet vent on top and toilet coming in from the right:



Thanks for any feedback.

MA is under our own code.
bottom left and bottom center are acceptable even if it is a dry vent.
remember the vent must be 2 inch undiminished all the way thru the roof or until it ties into a vent stack.

Thanks. My county has their own plumbing code too which was recently updated. With the update it references the 2009 IRC so I question where they are coming from. Anyway, the actual wording in the IRC says no so heel for toilets I am going to squeeze in a san-tee to avoid any issue.