I still collect used oil, mostly from restaurants to use in my waste oil fired hot water boiler. the boiler resides in a small workshop attached the the rear of my garage.
Pure comfort pulling up a chair in front of that old cast iron radiator with a sore aching back listening to some old Pink Floyd CD's while pulling them rheostats and relays apart. I'm using an old propane tank for my expansion tank on the boiler. Well it's not really an expansion tank just catches the over flow when the anti freeze expands by 30% when heated.
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