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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 LPD (400 GPD) and 5,678 LPD (1,500 GPD). Management methods for the treated effluent discharged from residential wastewater treatment systems are not addressed by this standard.
Document History
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NSF/ANSI 40-2023
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Residential Wastewater Treatment Systems- Most Recent
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NSF/ANSI 40-2022
Residential Wastewater Treatment Systems- Historical Version
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NSF/ANSI 40-2020
Residential Wastewater Treatment Systems- Historical Version
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NSF/ANSI 40-2019
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2018
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2013
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2012
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2010
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2009
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2005
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2004
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-2000
Residential Wastewater Treatment Systems- Historical Version
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NSF 40-1999
Residential Wastewater Treatment Systems- Historical Version