There are good things about being resourceful, and one of them is that you get to save on things you normally pay for. Among the best products you can recycle is waste oil, and this can really come in handy especially when you have an old oil boiler at home.
In this project, a benefit of recycling waste oil is shown when this guy decided to use his waste oil and run it in his old oil boiler to heat about 80 US gallons of water.
Image source: GerrysDiy
Move on to the Next Page video: Free hot water and heating from waste oil. Easy build.