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About This Item

 

Full Description

This Standard contains minimum requirements for residential wastewater treatment systems having rated treatment capacities between 1,514 L per day (400 gal per day) and 5,678 L per day (1,500 gal per day). Management methods for the treated effluent discharged from residential wastewater treatment systems are not addressed by this Standard.

System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with the requirements therein. This Standard shall in no way restrict new system designs, provided such designs meet the minimum specifications described herein.
 

Document History

  1. NSF 40-2019

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    Residential Wastewater Treatment Systems

    • Most Recent
  2. NSF 40-2018


    Residential Wastewater Treatment Systems

    • Historical Version
  3. NSF 40-2013


    Residential Wastewater Treatment Systems

    • Historical Version
  4. NSF 40-2012


    Residential Wastewater Treatment Systems

    • Historical Version
  5. NSF 40-2010


    Residential Wastewater Treatment Systems

    • Historical Version
  6. NSF 40-2009


    Residential Wastewater Treatment Systems

    • Historical Version
  7. NSF 40-2005


    Residential Wastewater Treatment Systems

    • Historical Version
  8. NSF 40-2004


    Residential Wastewater Treatment Systems

    • Historical Version
  9. NSF 40-2000


    Residential Wastewater Treatment Systems

    • Historical Version
  10. NSF 40-1999


    Residential Wastewater Treatment Systems

    • Historical Version