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sewage

  1. W

    What is the logic behind IPC 715.1 "Backwater Valves"?

    The code reads: 715.1 Sewage Backflow Where plumbing fixtures are installed on a floor with a finished floor elevation below the elevation of the manhole cover of the next upstream manhole in the public sewer, such fixtures shall be protected by a backwater valve installed in the building...
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