I'm looking at tapping into an existing drain line at the vertical vent, which I understand should be via a horizontal run to a sanitary tee. The vent is 2 inch PVC; the horizontal piece I will install is 2 inch PVC.
But what makes a tee "sanitary?" Everything I can find emphasizes the correct usage of tees vs. wyes instead. Fair enough, but how can I recognize the correct tee?
Specifically, I think I grabbed an equal tee(?) instead — how can I recognize whether I have the right part?