I've got a 2010 Road Warrior where I'm redoing my bathroom with the intention of removing the sink but keeping the drain as my new shower drain (or just cap it and keep the old one). I've now noticed that the drain seems to have a vent on it under the sink, I thought that would have been located away, and led up to the roof. Thoughts? Will I need to create a new place for a vent if I utilize this or if I cap it? Thanks in advance! (The picture might be sideways, I'm on my phone creating this post)