Orenco's Molded Fiberglass Tanks Pass Rigorous Strength Tests

Orenco’s Molded Fiberglass Tanks Pass Rigorous Strength Tests

Sutherlin, Ore., April 30, 2005 — Since Orenco Systems®, Inc. introduced its injection-molded fiberglass septic tanks last year, more than 600 have been installed. Orenco is the only manufacturer making fiberglass-reinforced polyester (FRP) tanks using resin transfer molding. Better known as a method of making boat hulls, this process produces uniform tank halves that can easily be assembled into a lightweight, watertight tank.

Orenco’s tank assemblers test every tank for watertightness before it is installed. Orenco also requires its installers to test every tank for watertightness once it’s in the hole. The 1,500-gallon tanks can withstand a vacuum of 11 to 13 in. Hg, and the 1,000-gallon tanks can withstand 13 to 14 in. Hg — about twice the pressure that bears on an empty tank buried four feet deep with water to grade and a 2,500-lb. wheel load.

Orenco’s ability to supply strong, watertight tanks opens up new possibilities for designers planning decentralized wastewater systems. “If local or national standards required tanks to be watertight and to pass strength tests, and enforced those requirements, onsite and decentralized systems would be accepted much more widely than they are,” said Eric Ball, Orenco’s vice- president of product development.

 

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