Quick Answer
Yes, there are differences between underground and above-ground tanks. Underground tanks provide protection from extreme temperatures and are more visually discreet, while above-ground tanks are more accessible and often less expensive.
Underground vs. Above-Ground Water Storage Tanks
Choosing the Right Location
When selecting a location for an underground water storage tank, consider the water table, soil type, and nearby utilities. Aim to bury the tank at least 12 inches below the frost line to prevent freezing damage. For example, in areas with a high water table, a tank may need to be installed on a higher elevation to ensure proper drainage and prevent seepage.
Construction and Material Differences
Underground tanks are typically made from durable materials such as high-density polyethylene (HDPE) or fiberglass-reinforced plastic (FRP). These materials are resistant to corrosion and can withstand pressure from surrounding soil. Above-ground tanks, on the other hand, are often made from galvanized steel or polyethylene and can be more prone to corrosion and damage from weathering. When installing an underground tank, it’s essential to follow the manufacturer’s instructions for backfilling and compaction to prevent settling or collapse.
Maintenance and Accessibility
Above-ground tanks are generally easier to access and maintain, as they can be inspected and cleaned without excavating the surrounding soil. Underground tanks may require more labor and equipment to inspect and clean, but they can also provide additional protection from pests and contamination. Regular maintenance, such as inspecting the tank’s condition and inspecting for signs of leaks, is crucial for both types of tanks to ensure safe and reliable water storage.
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