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  1. Carlos Marsik

    Chain and Lock method to supervise a valve

    Thank you.
  2. Carlos Marsik

    Chain and Lock method to supervise a valve

    Good morning, I have several valves controlling the main water supply to domestic and fire protection services. Those valves, instead to have a supervisor reporting to the fire pànelpanel are protected with chain and lock. Is that accepted by NFPA_ Thank you.

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