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  1. DDE305

    Schedule 80 for underground fire protection supply - outside of the building

    Thanks - for the info and thanks for the previous link. With that said, yes the thrust blocks are the important thing and the c900 is a choice.
  2. DDE305

    Schedule 80 for underground fire protection supply - outside of the building

    I am looking at a job where the supply line is a 6" schedule 40. The owner will be changing to to a schedule 80 and we plan to connect to that to supply the fire sprinkler system. My question is, is schedule 80 allowed for underground piping to supply the fire sprinkler. Or is C900 the only...

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