Norwesco Storage Tanks

  • 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.
  • SINGLE OR DOUBLE COMPARTMENT
    We offer tanks in both single and double compartment (2/3 - 1/3).  Prior to installing any septic tank, you should check with your local health department for specific requirements that your county or state may enforce.
  • ACCESSORIES AVAILABLE
    Manhole extensions and lid-riser combinations are available to bring tank access to grade and to meet code specifications.


  • 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.

Norwesco Storage Tanks