Oil burners: How to Inspect, Diagnose & Repair Oil
An oil leak anywhere in the oil piping, are a problem, as we explained just above. A leak between the oil storage tank and the oil burner will usually cause improper oil burner operation - leaks of oil out of the oil piping become air leaks into the oil piping system when the oil burner is running and trying to draw oil from the oil storage tank, because during burner operation the oil piping is under vacuum.
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