Anybody know what the green fittings are? The house also had ABS glued to PVC so I am suspicious.
ABS glue on PVC? Id call for a full evaluation by a plumber just for that. Unless they used transition cement.
Maybe Polypropylene used in laboratory waste and venting. Normally brown, turquoise or blue.
Looks like its just some old pipe and fittings that was found and used.
Stuff used to be kind of a beige at first.
What about those risers, did you check them out?
This place had everything, pipes grading backwards, PB with plastic crimps, traps about a half a mile or so from the riser, it could have been a text book on how not to do plumbing.