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AWWA C521-23 Plastic Ball Valves, 2023
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Plastic ball valves have been in use since the 1950s. In 2001, the AWWA Standards Council received a request to develop a standard for plastic ball valves. As a result of this request, the AWWA Standards Council formed an exploratory ad h [Go to Page]
- I.B. History. The first edition of this standard was designated ANSI/AWWA C521-18, Plastic Ball Valves. The AWWA Board of Directors approved the first edition on October 24, 2018. This edition was approved on October 23, 2023. [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. Materials. The materials section of this standard recognizes the advances that have been made in the development of nonmetallic materials for water ball valve construction. Plastic materials are currently being used for water ball valves; because of [Go to Page]
- II.B. Permeation. The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping systems in locations where there is likelihood the piping system will be exposed to significant concentrations of p [Go to Page]
- II.C. Chlorine and Chloramine Degradation of Elastomers. The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented
- 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, definitions, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions.
- V. Comments. If you have any comments or questions about this standard, please contact 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 Materials.
- Sec. 4.2 General Design [Go to Page]
- Table 1 Port diameter for body inlet, body outlet, and ball
- Sec. 4.3 Workmanship and Coatings
- SECTION 5: VERIFICATION
- Sec. 5.1 Inspection
- Sec. 5.2 Manufacturer Testing
- Sec. 5.3 Proof of Design Testing
- SECTION 6: DELIVERY
- Sec. 6.1 Marking
- Sec. 6.2 Preparation for Shipment
- Sec. 6.3 Affidavit of Compliance [Go to Page]
