IAPMO/ANSI Z1000-2019 Prefabricated Septic Tanks
This Standard covers prefabricated septic tanks made of concrete, fiber‐reinforced polyester (FRP), thermoplastic, or steel, intended for use in residential or commercial sewage disposal systems, and specifies design, material, performance testing, and marking requirements.
1.2 Alternative Materials
The requirements of this Standard are not intended to prevent the use of alternative materials or
methods of construction, provided such alternatives meet the intent and requirements of this Standard.