"I threw my hose away...I get everything packed up, warm the engine, close the slides, open the valves and drive off."
Back in the 80's while working as a mechanic a class A Barth came in for a service job. It had a connection from the holding tank to the vehicle exhaust system. Owner said it "burned" a gallon every 5 miles. Don't think I'd want to follow too close!
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