Venting a peninsula

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trunt

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Terry Here, first post.. I'm planning a kitchen remodel changing from a sink on a wall to a peninsula with wall to one side. To complicate things this is on a concrete slab. The sink ends up in the same basic position with the PVC 2" drain dropping into the slab behind the cabinets where I plan a 5" void for plumbing runs. the issue is venting it as Delaware frowns upon vent valves when there is a dishwasher and disposal as well. There is currently a dedicated 1.5" vent running up the removed wall to the joists which I can connect to from the side wall. However I found that the code does not allow horizontal vent runs below the sink flood height+6" However 45 degree runs are considered vertical. I have 2 ideas in the images. Comments/ideas appreciated.
vent1.jpg
vent2.jpg
 

Jeff H Young

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top drawing works bottom drawing no bueno Top drawing is perfect in my opinion and I dont know of any code that prohibits it. Personally I prefer a real vent over an AAV so i wouldnt want the aav regardless of whether it was aprooved however it mighta been easier but im talking quality of work the vent is always better
 

trunt

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Thanks
Yes after reading up I'm happier with a proper vent. The top seemed good and pretty simple to me but have to admit bottom was a late punt! I was also thinking I should put a cleanout directly above the drop into the concrete.
 
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