Propane Tanks Hazardous Waste See Alternatives Illegal in Garbage & Drains Caution! Do not place old tanks in your garbage or recycling carts. Propane tanks can explode and cause serious injury! If there is any gas in the tank, or if your tank has a broken valve and still contains gas, take it to the Household Hazardous Waste drop-off. If a tank is 100% empty of propane, you may take it to the RRF where it will be recycled as scrap metal. By law all tanks between 4 and 40 lbs. must have an Overfill Protection Device. Find out what to do with household hazardous waste Do Not Tamper With If you are waiting to dispose of a tank, store them outside and upright with their caps on tight. Write empty on the container, and do not try to remove the valve. Especially Hazardous if Not Empty A propane tank is still pressurized and can explode or start a fire if it’s not entirely empty. Propane can also be damaging to your health if touched or inhaled, so any tank that is not empty must be disposed of as hazardous waste. Use Up Completely Empty propane tanks are less likely to injure people, because the tank is not pressurized with propane gas. Alternative Ways to Recycle AmeriGas Offers Free Tank Disposal You can dispose of propane tanks by returning them to AmeriGas. Find an AmeriGas office. Fees may apply.