Saniflo upflush toilet waste tie in

[lahrs19]

I am in the beginning stages of adding a bathroom in my basement. I would like to use a saniflo upflush toilet to avoid the breaking up the concrete route. I am trying to figure out the best way to tie in the waste line. I have a 3 cast iron soil stack and it has a “y” already installed for the 2 upstairs bathrooms and a tee for the toilets. I am assuming I need to tie directly into the stack since it will be a waste line. I have also read I can’t just remove a section of CI and replace it with pvc due to the weight above it. I am also assuming that I couldn’t tie into the exisiting “y” because it is already in use by the upstairs bathrooms.

I’m not really sure of my options at this point besides ripping out the whole stack and replacing with pvc. Which would not be ideal.

Any advice or help would be appreciated.

 

[frodo]

you can install pvc in a cast run if you use the correct band

 

[TomFOhio]

If you use metal strapping to hold the cast iron that will work for you. On the Saniflow system you have to tie in
to a 3" or 4" line. It must go on top like frodo is showing you.