I wish to add a basement 1/2 bath consisting of a WC and a vanity. It will drain into a 4" vertical Cast Iron waste stack. I am going to break up the floor and wish to tie into this waste stack. How would you tie into and with what material? Can I wetvent the WC through the sink? Can I use a Automatic air valve to vent this group? How high and where would you place this AAV? Thanks for any info.
bman55