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  1. P

    NFPA 20 - Check valve on fuel return line

    Hello, Can anyone explain the basis of the check valve for fuel return line to be as per engine manufacturer requirement instead of being a hard requirement in NFPA 20 and how does engine manufacturers decide if a check valve is required or not?
  2. P

    Check valve on fuel return line - NFPA 20

    I'll check it out, thank you.
  3. P

    Check valve on fuel return line - NFPA 20

    Hello, Can anyone explain the basis of the check valve for fuel return line to be as per engine manufacturer requirement instead of being a hard requirement in NFPA 20?

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