Underground Tanks

Tanks for water and wastewater storage

KBK has been a leading fiberglass tank manufacturer since 1975.

Engineered to meet tough standards for long-term storage

KBK’s underground storage tanks are designed to endure harsh environments. Constructed of sturdy, ribbed polyethylene or fiberglass reinforced plastic (FRP), they resist the permeation of chemicals and gases naturally present in soil and sewage.

Optional Accessories

  • Engineered Stamped Drawings
  • Bolted Cover
  • Hinged Cover (lockable)
  • Ladders
  • FRP Half or Full Couplings
  • FRP Flanges
  • PVC or FRP pipe Stubs
  • Concrete Deadman Anchors
  • Anchor Straps
  • Additional Lift Lugs
  • Inspection Hatch (lockable)

High-quality manufacturing, engineering and customer service

Tanks are manufactured using Double-drive Magnum Venus winders for superior tank strength. In-house hydro testing and a dedicated QC department ensure tank quality. Our full-time engineering and drafting personnel make sure you get the exact right tank system for your facility, while our professional logistics and customer service staff provides the support you need for on-time deliveries and service after the sale.

Tank capacities

  • 300 to 60,000 gallons

Built to meet tough specifications

  • NSF61
  • AWWA D120
  • NSF 61IAPMO Z1000
  • NFPA 22

​Diverse applications

  • Agribusiness
  • Potable water
  • Gray water
  • Sewage and wastewater
  • Landscape irrigation
  • Stormwater
  • Fire cisterns
  • Fire sprinkler reservoirs
  • Industrial processes
  • Proprietary water treatment products
  • Purified drinking water
Contact us for a quote

Oil Storage and Separation

Maximize your oil recovery with the world's most efficient oil-water separation system. Our patented KBK skim tanks can pay for themselves in just a few months.

Municipal and Industrial Tanks

Choose from storage tanks and salt water tanks with capacities to 47,250 gallons. Truck tanks are available in sizes ranging from 250 to 4,000 gallons.

Agriculture Tanks

Safely store fertilizer, chemicals and most acidic materials in tanks with capacities of 500 to 50,000 gallons.

Underground Tanks

In capacities of 300 to 60,000 gallons, our FRP underground tanks are a strong, durable and environmentally smart solution for your long-term water storage needs.