WOW! Exterior Insulation Can Be Attractive! This 150,000 Gallon Fire Protection Tank was recently completed by National Storage Tank and ready for use. Insulation can be installed on existing tanks and new tanks alike. If you have an existing tank that needs insulation, please reach out to us for pricing. If you need a new tank for your project, please contact us anytime for a proposal. We have fast turnaround times and competitive pricing. Insulation is used for many applications, from freeze protection on fire protection tanks per NFPA, or for hot and cold water storage tanks, potable water storage for municipalities in freezing locations and so much more!