NSF 418-2014

The purpose of this standard is to establish consistent site selection and data evaluation methods for
obtaining field longevity results for septic tank effluent filters.

This Standard provides site selection, auditing, and methods for evaluating the field performance as it
relates to longevity of septic tank effluent filters.

Only septic tank effluent filters that are certified in accordance with the current version of NSF/ANSI 46
may be certified under this Standard. An effluent filter that has completed third-party testing in compliance
with an evaluation, certification and listing protocol equivalent to NSF/ANSI 46 shall be acceptable,
provided all data pursuant to the testing is published and the results verify that the device is capable of
performance as defined in NSF/ANSI 46.