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AWWA B101-22 Precoat Filter Media, 2022
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Precoat media filtration is a process in which the filter media, typically diatomite or perlite, are applied to a support structure, used for filtration, then removed and disposed of on a cyclic basis. This process is unlike granular-medi [Go to Page]
- I.B. History. ANSI/AWWA B101 was approved as a new standard by the AWWA Board of Directors on June 23, 1994. Subsequent revisions were approved on June 17, 2001, June 10, 2012, and Jan. 16, 2016. This edition was approved on Oct. 24, 2022. [Go to Page]
- I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct
- II. Special Issues. [Go to Page]
- II.A. Storage and Handling Precautions. Diatomaceous earth (DE) is a silica product; prolonged breathing of excessive concentrations of its dust may cause lung damage. Most grades of DE used in filtration contain crystalline silica, which may cause silico
- III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. [Go to Page]
- III.A. Purchaser Options and Alternatives. The following items should be provided by the purchaser: [Go to Page]
- III.B. Modification to Standard. Any modification to the provisions, definition, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions. Major revisions made to the standard in this edition include the following:
- V. Comments. If you have any comments or questions about this standard, please contact AWWA Engineering and Technical Services at 303.794.7711, FAX at 303.795.7603; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at sta
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- SECTION 2: REFERENCES
- SECTION 3: DEFINITIONS
- SECTION 4: REQUIREMENTS
- Sec. 4.1 Physical Requirements
- Sec. 4.2 Chemical Requirements [Go to Page]
- Table 1 Typical physical properties of precoat media used in water treatment [Go to Page]
- Table 2 Typical chemical properties of precoat media used in water treatment
(values presented as percentages) [Go to Page]
