1. Identify static system pressure on your six risers. 2. Adapt from your FDC inlet to a ¼” nipple and see if FDC will hold air pressure with a portable compressor. Apply 20 psi, valve off and see if it bleeds off. If it bleeds off, I would NOT apply water. It may have been abandoned. Building occupant would then need to review with past building architects/engineers, contractors to find history of FDC. Employee local sprinkler contractor to further investigate. 3. If it holds air, Connect pumper truck to FDC. Gently apply water at below system static pressure, monitoring for leaks. 4. If system static pressure is reached without leaks, increase pressure 10-15 psi at the pumper truck and see which riser gauge(s) increase.
Thank you, Jackie “JW” Ward 1-405-240-7076 From: Tim Easter <[email protected]> Sent: Tuesday, February 4, 2025 6:27 AM To: [email protected] Subject: [Sprinklerforum] Fdc help We have a fdc on building. No sign. How do we test the fdc to determine what it supplies? Looking for procedure. Thanks. We have a fdc on building. No sign. How do we test the fdc to determine what it supplies? Looking for procedure. Thanks.
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