The purpose of this standard is to provide the requirements for materials, design, testing and inspection, and shipping of PEX tubing for use as service lines in the construction of underground water distribution systems.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003This standard describes crosslinked polyethylene (PEX) pressure tubing for use primarily as potable service lines in the construction of underground water distribution systems. I.B.\tHistory.\u2003On June 18, 2002, the American Water Works Association (AWWA) Committee on Polyolefin Pressure Pipe and Fittings was approached to develop a standard describing PEX for water service applications. On June 15, 2004, the polyolefin committee u I.C.\tAcceptance.\u2003In 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 <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | II.\tSpecial Issues.\u2003AWWA\u2019s \u201cCommittee Report\u2014Design and Installation of Crosslinked Polyethylene (PEX) Pipe in Accordance with AWWA C904\u201d was developed and approved by the AWWA Standards Committee on Polyolefin Pressure Pipe and Fittings and was published II.A.\tDesign Criteria. Table F.1\tHydrostatic design basis and hydrostatic design stress for PEX tubing <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | II.B.\tInstallation. <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | II.C.\tWater System Disinfection.\u2003PEX tubing should be disinfected in accordance with ANSI\/AWWA C651, Disinfecting Water Mains. Refer to Sec. A.4.10 and Sec. A.5.1 for more information on disinfection. II.D.\tSqueeze-Off.\u2003The use of squeeze-off techniques for emergency shutoff should be performed only on materials, wall thicknesses, and tubing diameters as recommended by the tubing manufacturer. Squeeze-off should be performed in accordance with ASTM F10 II.E.\tReferences.\u2003The latest editions of the following documents are incorporated by reference in Sec.\u00a0II of this foreword to the extent specified. In case of conflict, the provisions of Sec.\u00a0II shall prevail. These references are provided for information <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | III.\tUse of This Standard.\u2003It 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. III.A.\tPurchaser Options and Alternatives.\u2003The following items should be provided by the purchaser. <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | III.B.\tModification to Standard.\u2003Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major changes made to the standard in this revision include the following: <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | V.\tComments.\u2003If you have any comments or questions about this standard, please contact AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standards@awwa.org. <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication SECTION 2:\u2002REFERENCES <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tPermeation Sec.\u20024.2\tMaterials <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Table 1\tHDS, HDB, and pressure class of SDR9 PEX tubing for water at 73\u00b0F (23\u00b0C) Sec.\u20024.3\tTubing <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 2\tOutside diameters and tolerances for SDR9 PEX tubing Table 3\tSustained water pressure test condition for SDR9 PEX tubing <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | SECTION 5:\u2002VERIFICATION Sec.\u20025.1\tGeneral <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Sec.\u20025.3\tTests for Product Quality Control Sec.\u20025.4\tNonconformance Sec.\u20025.5\tQuality Control Records Sec.\u20025.6\tPlant Inspection by the Purchaser <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | SECTION 6:\u2002DELIVERY Sec.\u20026.1\tMarking <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Sec.\u20026.2\tShipping and Delivery Sec.\u20026.3\tAffidavit of Compliance <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Design and Installation of Crosslinked Polyethylene (PEX) Tubing in\u00a0Accordance\u00a0with\u00a0ANSI\/AWWA C904 <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Table A.2\tAverage inside diameters for SDR9 PEX tubing (CTS) <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Bibliography of Sources for Additional Information \nRegarding Permeation of Polyolefin Tubing <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C904-22 Crosslinked Polyethylene (PEX) Pressure Tubing, 1\/2 In. (13 mm) Through 3 In. (76 mm) for Water Service<\/b><\/p>\n |