Essential Tips for 120 Gallon Propane Tank Maintenance Proper propane tank maintenance is essential for safety, efficiency, and longevity, especially for a 120 gallon propane tank that serves as a reliable fuel source for various home and commercial needs. With a few proactive steps, you can ensure that your tank operates safely and efficiently throughout the year. 1. Routine In... https://flamekingproducts.com/products/flame-king-420lb-120-gal-asme-propane-tank-cylinder-with-float-gauge