Underground STI-P3® Single-Wall:
First issued in 1969, STI-P3® tanks feature a pre-engineered corrosion protection
system that has withstood the test of time. The P3® is the most successful underground
steel storage tank technology ever developed. It combines the strength of steel with a
three-way protection system: 100% solids polyurethane dielectric coating, electrical
isolation and factory-installed cathodic protection system using sacrificial anodes. STI-P3®
tanks are UL-58 and UL-1746 compliant. Standard 10-year warranty with 30-year warranty available.