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AWWA B506-25 Zinc Orthophosphate, 2025
- Foreword [Go to Page]
- I. Introduction [Go to Page]
- I.A. Background. Phosphate chemicals are among the few substances that can be safely and effectively used in potable water for corrosion control and/or inhibition. There are several types of phosphate inhibitors available, including zinc orthophosphate (Z [Go to Page]
- I.B. History. The first edition of ANSI/AWWA B506, Zinc Orthophosphate, was approved by the AWWA Board of Directors on Feb. 12, 2006. The last edition was approved on June 11, 2018. This edition was approved on Jan. 23, 2025. [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. ZOP that is a dry solid should be stored in closed containers in a cool, dry area on concrete floors and should be protected from physical damage. Dry ZOP has an affinity for water and can easily absorb moisture, wh
- 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 information should be provided by the purchaser: [Go to Page]
- III.B. Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions. Major changes made to the standard in this revision include the following:
- V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711, write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098, or e-mail at standards@awwa.org.
- 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
- Sec. 4.3 Impurities‡
- SECTION 5: VERIFICATION
- Sec. 5.1 Sampling
- Sec. 5.2 Test Procedures
- Sec. 5.3 Notice of Nonconformance
- SECTION 6: DELIVERY
- Sec. 6.1 Marking*
- Sec. 6.2 Packaging and Shipping
- Sec. 6.3 Affidavit of Compliance or Certified Analysis [Go to Page]
