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where to put main vent

2K views 3 replies 2 participants last post by  hohadcr 
#1 ·
i am adding 1.5 bath and a kitchen to 1 st floor of a 3plex. there is no existing venting.

the 2 toilets are about 7' away from the 4" main stack. and other drains are kinda surrounding the toilets.

i dont know if i should:

1. put the main vent ringt on top of main stack-- then i need to run auxilary venting for every drain;

2, or, put the main vent right where the toilet drains are -- then i only need to run a couple of aux venting, though the main vent is not on top of main stack(does that matter?)

what would you suggest?

thanks
 
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