• AWWA C105/A21.5-05
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AWWA C105/A21.5-05

  • American National Standard for Polyethylene Encasement for Ductile-Iron Pipe Systems
  • standard by American Water Works Association, 12/01/2005
  • Publisher: AWWA

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This standard covers materials and installation procedures for polyethylene encasement to be applied to underground installations of ductile-iron pipe. This standard may also be used for polyethylene encasement of fittings, valves, and other appurtenances to ductile-iron pipe systems. Appendix A contains notes on procedures for soil survey tests and observations and their interpretation to determine whether polyethylene encasement should be used.

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