We installed a new Roth oil tank on Friday.  This customer was told by his insurance company that he needed to replace his oil tank with a new double bottom one, or they would no longer insure him.  This is starting to be common practice among insurance companies.  As of January 1, 2013, all old or faulty oil tanks are required to replaced with a double bottom tank.  We recommend the Roth Double Wall Tank; it is constructed with an inner tank, which is the primary oil storage tank, and an outer containment tank, which is the secondary containment basin.  The inner tank is made of corrosion proof polyethylene.  The outer containment tank is made of corrosion resistant galvanized steel. The Roth tank comes with a 30 year warranty too. Now that is a quality tank!