Households on septic systems should not dispose of antifreeze down the drain.
- Even in a diluted form, antifreeze can overwhelm and destroy the bacterial action in your septic system and drain field.
- Provide adequate ventilation by opening windows and doors and/or turning on a room fan.
- Carefully pour about 1 gallon of diluted antifreeze down the drain, flushing with large amounts of water. Failure to dilute antifreeze may damage pipes or other parts of your plumbing.
- Continue disposing in 1-gallon batches until completely gone.
- Don't mix products. Wait several hours between disposing of different types of products.
- The best time to do this is during the working day, when the sewage system is in full use, so this material passes through the municipal sewage system faster.
- Contact your wastewater treatment facility to make sure it can accept the waste before using this method.