Norwesco septic tanks are rotationally molded in one piece for seamless construction. The rib design and placement provide superior structural integrity to the tank. Our polyethylene tanks are highly resistant to soil chemicals and sewage gases and approved by the FDA for wastewater storage, ensuring an environmentally safe, quality tank. Prior to installing any septic tank, you should check with your local health department for specific requirements that your county or state may enforce.

• EASE OF INSTALLATION: For septic system replacement and new home construction, Norwesco's polyethylene septic tanks are designed for durability and quick, easy installation.
• ROTATIONALLY MOLDED, ONE-PIECE CONSTRUCTION: Norwesco septic tanks are manufactured by means of the rotational molding process which produces a one-piece, seamless, watertight tank.
• SUPERIOR STRENGTH DESIGN: The rib design and placement in our Legacy tanks provide superior structural integrity to the tank.
• EXCELLENT CHEMICAL RESISTANCE: Polyethylene is unaffected by soil chemicals and by the chemicals and gases present in sewage, so Norwesco septic tanks will not rust or corrode and require no additional coatings as other tanks do. Norwesco's strict quality guidelines ensure an environmentally safe septic tank.
• WATERTIGHT LID: Norwesco septic tanks come outfitted with a watertight lid. This improved design is significantly stronger than other lid designs. When leaving our factory, the lid will be attached to the tank with stainless steel screws and comes standard with a gasket between the lid and the tank. The gasket provides a watertight seal at the lid area.
• ACCESSORIES AVAILABLE: Manhole extensions and lid-riser combinations are available to bring tank access to grade and to meet code specifications.