Is FLEX disc flushable? Helena May 13, 2019 23:16 Updated Follow Short answer: No. FLEX disc is not septic-safe and should always be disposed of in the trash. Related articles Is my menstrual blood going to be pushed back up into my uterus? Where can I purchase FLEX disc? Can you pee, poop, swim, and sleep while wearing FLEX disc? Can I wear FLEX disc for my entire cycle? Is FLEX disc biodegradable? Comments 0 comments Article is closed for comments.