First time poster here preparing for a DIY basement bathroom finish. The photo attached is the rough in plumbing while the house was under construction. Upper left is the tub, bottom right sink, 3” is the toilet. Based on this configuration, can I vent the sink and be within code? According to code, I can have one device above the vent (which would be the tub), sink is 2nd in line and the start of the wet vent, and it appears that the toilet is 3rd and the end of a wet vent. Any help is appreciated!
flow goes top to bottom in the image.
flow goes top to bottom in the image.
