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That is deffinetly an emergency floor drain fitting and placement confirms. Emergency drains have 0 dfu value and are only for emergencies so probably was not vented except as part of the main stack. SO DIY, you must replace the drain fitting which the trap is integral to the old one, so you will need to dig a little deeper and install a new trap as well. No permits right, don't worry about the vent and the inspector (not) won't say anything about covering up your stack cleanout. Unless the stack was going to be a visible part of your shower?
BTW have your main sewer line cabled at least before you close it all up.
So what you are saying is this drain is connected to the storm/ground water system.
If it's tied to the waste,it needs a trap.If it has a trap,it needs a vent.
I skimmed the thread and thought originally we were talking about converting a shower drain into a floor drain for a basement. Upon reviewing the thread, I'm not so sure anymore. Thread drift; gotta love it.
I think Ben mean't if it was a floor drain or emergency drain, UPC say's it still has to be vented.
The only time I have ever run anything without a vent was chemical pipe, I can't remember the whole thing, but I do remember something baout the air riding the top of the pipe, causing it to drain, and if I remember it went to a storage tank.
I will get torn to pieces for this post. You've got a 4" stack not two feet from that drain. I'll bet anything it goes straight up through your roof. There is no FUNCTIONAL need for a separate vent, though I wouldn't doubt code requires it as wet vents are not allowed, at least in some places.
This is my reminder to myself that no good will ever come from discussing politics or religion with anyone, ever.
Ace when you have a drain that close to the stack when you dump from above the lowest connected fixture (floor drain) you will always have the chance of sucking the trap dry. The Y should be connected 10x the pipe diameters down stream from the base of the stack because of the hydraulic jump. The floor drain should be vented by one means or another no matter if it is a emergency floor drain or just a normal floor drain. I think the two should be on in the same in our code books.