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Roth tank with overhead line.
Im new here but always reading the posts, i have a new Boiler installed little over a year ago, my oil tank is buried underground very old, i have friends in the construction business so one day i got a call about a brand new Roth tank so i went to got it for free. got the guy installed a single overhead line connected to a tigerloop 100 gallons on tank purge the lines and got the boiler running and left. a noticed every time boiler runs now the chamber on tigerloop FOAMS a lot, text it the guy he says is normal. it never did that before with the buried tank im afraid im going to loose prime and boiler will stop running on the coldest night.