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Plastic Septic Tanks in Washougal, WA

These are the Norwesco plastic septic tanks molded at Norwesco's Washougal, WA plant in sizes from 300 to 2,000 gallons. When Washougal is the Norwesco plant closest to you, every tank page quotes LTL freight from Washougal to your ZIP.

Septic tanks, pump tanks and related parts for below-ground use. See every size from every plant in Norwesco Plastic Septic tanks, or everything made in Washougal in Norwesco Tanks in Washougal, WA.

Before you order

  • Know your liquid. Standard tanks are rated to 1.5 specific gravity (12.52 lbs per gallon). Heavy duty tanks are rated to 1.9 (15.87 lbs per gallon).
  • Above or below ground. Underground and septic tanks are made to be buried; above-ground tanks are not.
  • Accessories ship with the tank. Bands, saddles and stands ship from the same plant as the tank.
  • Questions? Call 866-418-1777.
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