Frequently Asked Questions What items should not be flushed down the drain or toilet? Homeowners wanting to take good care of their septic systems should make note of the following items that should never be flushed down the drain or toilet. These items can overtax or destroy the biological digestion taking place within the system or clog pumps and pipes. Take care not to flush the following: hair combings coffee grounds dental floss disposable diapers kitty litter feminine hygiene products cigarette butts contraceptives gauze bandages fat, grease, or oil paper towels NEVER flush chemicals that could contaminate surface and groundwater, such as: paints varnishes thinners waste oils photographic solutions pesticides Return to FAQ's