You 1000% can put a t on its back for venting purposes only. Your y is not only unnecessary but backwards anyway lol. Also can’t use a combi fitting on the vertical to horizontal for a trap arm, that’s the same as a y and 45 fitting and puts the connection drain below the trap weir. You really should not give a demonstration video if you are uneducated in the topic you are trying to educate on. Blind leading the blind with this video
Why is there a separate vent for the sink when the sink drain ties in the the 3" main vent?
Yea I saw that and had a little chuckle 😃
Because he used a combi instead of a Santee so he needed a vent before that fitting
😂
You 1000% can put a t on its back for venting purposes only. Your y is not only unnecessary but backwards anyway lol. Also can’t use a combi fitting on the vertical to horizontal for a trap arm, that’s the same as a y and 45 fitting and puts the connection drain below the trap weir. You really should not give a demonstration video if you are uneducated in the topic you are trying to educate on. Blind leading the blind with this video
That sink vent is not only useless it's not code u do not vent like that