I'm hoping to add a second bath to the second floor a 101 year old house remodel and am having trouble finding a suitable place to put the soil stack. Can I place it outside the dwelling down an exterior wall? If yes, do I have to build a chase around it (I live near Seattle)? Also, does the full 4" stack need to extend above the roof line or can I vent upwards above the wye with a smaller diameter vent line?
Thanks,
John
Thanks,
John