The Aquastore Glass-Fused-To-Steel tanks are bolted together and sealed with a moisture cured urethane compound specially formulated for Enginered Storage Products. The tanks offer an excellent protection against corrosion. The customer's benefits are: Low Cost Long Life Glass-Fused-To-Steel Expandability No Recoating Required Corrosion Resistant Single Source Responsibility 5 year coating warranty Other Advantages Include: EdgecoatingTM Meets US EPA requirements NSF Approved for no Additives AWWA D-103 FM (Factory Mutual) approved NFPA - 22 (National Fire Protection Association) ISO 9001 Installation - Aquastore tanks are erected by factory trained and certified building crews. Fast tank installation due to the use of the Aquastore patented mechanical jacking system. Capacities from 10,000 gallon to 4 million gallons