0Nate CougillBest Answer 5 years ago ReplyUpvote1. You could remove the sides of the tank with a diamond cutting wheel on an angle grinder, and use the large flat sides as a hone for your knives.2. use the float ball valve system to release rainwater capture on to your crops. Mount the tank below a cistern.3. Use the tank as the chimney portion of the rocket stove.4. The tank could be used as a hopper for adding dry material into a process, such as adding metal pellets to a foundry, or plastic pellets to a 3-D printer.