where to put main vent
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?