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NSF 350-2017:2016 Edition

NSF 350-2017:2016 Edition

$43.55

Onsite residential and commercial water reuse treatment systems

Published By Publication Date Number of Pages
NSF 2016-08-26 56
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Full Description

This Standard contains minimum requirements for onsite residential and commercial water treatment
systems. Systems may include the following.

  • Graywater treatment systems having a rated treatment capacity up to 5,678 L/day (1,500 gal/day).
    This applies to onsite residential and commercial treatment systems that treat graywater, those that
    treat laundry water from residential laundry facilities, and those that treat bathing water. See 8.1 for
    performance testing and evaluation.
  • Commercial treatment systems — this applies to onsite commercial treatment systems that treat
    combined commercial facility wastewater and commercial facility laundry water of any capacity, and
    those treatment systems that treat graywater from commercial facilities with capacities exceeding 5,678
    L/day (1,500 gal/day). These systems shall be performance tested and evaluated at the location of the
    reuse system installation, using the wastewater generated onsite from the facility serving the treatment
    system. See 8.3 for performance testing and evaluation. The key elements of a field evaluatin of a
    commercial treatment system are described in Annex A.

Management methods and end uses appropriate for the treated efflent discharged from onsite residential
and commercial treatment systems meeting Class R (single family residential) or Class C (multi-family and
commercial facilitiesds) requirements of this Standard include indoor restricted urban water use, such as
toilet and urinal flushing, and outdoor unrestricted urban water use, such as surface irrigation. Effluent
quality criteria consistent with these uses are described in 8.6, Criteria.

This Standard is intended to address public health and environmental issues. Actual performance for any
site or system may vary, depending on variations in raw water supply (such as alkalinity and hardness),
wastewater constituents, and patterns of use. The end use of the effluent is the responsibility of the owner,
design professionals, and regulatory officials.

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.

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