Only flush human waste and toilet paper down the toilet.
Never flush these items down the toilet because they could clog your septic system and cause a failure:
Cooking grease or oil
Non-flushable wipes, such as baby wipes or other wet wipes
Feminine hygiene products
Condoms
Dental floss
Diapers
Cigarette butts
Coffee grounds
Cat litter
Paper towels
Pharmaceuticals
Household chemicals like gasoline, oil, pesticides, antifreeze, and paint or paint thinners