Fiberglass Septic Tanks

Orenco's injection-molded fiberglass-reinforced polyester (FRP) septic tanks* set a new onsite industry standard for strength and watertightness. They are available in the following sizes:

  • 500 gallons (1893 L)
  • 1000 gallons (3785 L)
  • 1500 gallons (5678 L)
  • 2000 gallons (7570 L)

The tanks are light enough to transport in a pickup or small trailer and install with a backhoe, yet are far more rigid than polyethylene tanks. In fact, they're strong enough to withstand a four-foot burial depth empty.

In the 1000-gallon and 1500-gallon tanks, a baffle wall can be installed anywhere in the tank to create two or more compartments of suitable volume for the application.

Orenco's innovative injection molding process creates tank halves with a quality and consistency no one else can match. After molding at Orenco, Orenco Fiberglass Tanks are assembled by a regional network of factory trained and authorized assemblers. They test every tank for watertightness before shipping the tanks to installers or to Orenco tank wholesalers in their regions.

To purchase our tanks, use our online Distributor Locator.

Installers: Watch Tank Installation Video (35MB - 5 minutes)
*Covered by U.S. Patents #D461,870 and #D445,476


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Technical Resources

"You have the best quality tanks and manufacturing facility I have ever seen."

-- Inspector, Tank Certifying Agency