Essential Tips for 120 Gallon Propane Tank Maintenance Proper propane tank maintenance is essential for ensuring safety and efficiency, especially for a large 120 gallon propane tank. Whether you're using propane for heating, cooking, or as an energy source for appliances, regular maintenance helps prevent issues, saves money, and extends the lifespan of your tank. Here’s a quick g... https://flamekingproducts.com/products/flame-king-420lb-120-gal-asme-propane-tank-cylinder-with-float-gauge