Underground Tank
Fiberglass underground storage tanks
Long-lasting underground water storage tanks for water, wastewater, and chemicals
Fiberglass underground storage tanks offer a corrosion-resistant, high-strength solution for safely storing potable water, wastewater, and chemical liquids below ground. Designed with a durable external shell and specialized internal resins, these tanks are engineered to withstand underground pressure and environmental conditions—ensuring long-term, reliable performance for industrial, municipal, and residential use.
Looking for fiberglass underground solutions? We can help! Call us at 1-863-270-8118 or contact us to discuss your needs.
Engineered for custom depths and high-performance underground installations
Fiberglass underground storage tanks are engineered to meet a wide range of installation requirements, from residential and commercial setups to demanding industrial environments. Each tank includes a 20-inch manway, along with standard fittings for inlet, outlet, overflow or drain, and vent—ensuring safe, efficient liquid storage in any application.
Standard models are designed to be buried up to 36 inches (three feet) below ground. For deeper installations or applications subject to vehicle traffic or heavy surface loads, we offer traffic-rated and reinforced tank solutions. These customized configurations are built to maintain structural integrity and performance under pressure.
Fiberglass tanks are highly customizable to match your site-specific requirements. Contact us to request a tailored quote and ensure your underground storage solution is designed for maximum durability, regulatory compliance, and long-term performance.
Underground Fiberglass Features
- Fiberglass Tank Construction
- Sizing up to 20,000 gallons
- Standard 0-2" Fitting Options
- Standard Tank can be buried up to 36 inches (3') underground (Please specify if you would like a tank that can be buried more than 36 inches.)
- Traffic-Rated Tanks Available
Underground Fiberglass Benefits
- Lighter Weight for Easy Installation
- Resistance to Leaking and Cracking
- Equipped for Underground Elements
- Corrosion and Rust Resistant
- Resin Built to the Type of Liquid Store in the Tank
- Minimal Site Prep Required
| Fittings for the Fiberglass Water Tanks | |
|---|---|
| Standard Fittings | Galvanized (up to 2") or PVC (up to 4") |
| Specialty Fittings | Flanged Fittings, ABS, or Other Fittings (Considered Specialty and are Extra) |
Acessories
| Description | Dimensions | Weight |
|---|---|---|
| PIP Adapter | 20" D x 4" | - |
| 20" EXTENSION PER FOOT | 20" D x 12" | 20 |
| 24" EXTENSION PER FOOT | 24" D x 12" | 27 |
| 30" EXTENSION PER FOOT | 30" D x 12" | 35 |
| Lift Eye | - | - |
| NYLON Tie-Down Strap | 4" Wide | 5 |
| Jaw-&-Jaw Turnbuckle, 2 | - | 10 |
| 6-Hole Junction B w/ rings | 9"x14"x9" | 6 |
Fiberglass Tank Uses and Options
- Versatile Applications:
- Rainwater collection
- Potable water storage
- Backup supply for wells
- Irrigation storage
- Robust Contruction:
- Withstands underground pressure
- Prevents folding or collapsing
- High Chemical Resistance:
- Protects against underground elements
- Ideal for storing chemicals
Looking for fiberglass underground solutions? We can help! Call us at 1-863-270-8118 or contact us to discuss your needs.