Yes, if the pump suction and bypass valves are closed, the system can get up to pressure.
Micah Davis, SET NICET #124745 Water Based Systems Layout, Level IV Dynamic Fire Designs Mail: [email protected] Mobile: 931-242-1299 www.dynamicfiredesigns.com<http://dynamicfiredesigns.com> Dynamic Fire Designs • 13063 County Line Rd., Box #87 • Spring Hill • FL • 34609 This message is confidential. It may also be privileged or otherwise protected by work product immunity or other legal rules. If you have received it by mistake, please let us know by e-mail reply and delete it from your system; you may not copy this message or disclose its contents to anyone. The integrity and security of this message cannot be guaranteed on the Internet. ________________________________ From: Sprinklerforum <[email protected]> on behalf of Matt Grise <[email protected]> Sent: Friday, June 15, 2018 9:06 AM To: [email protected] Subject: RE: Pump Discharge Piping Is the jockey pump putting out enough pressure? Can you get the system up to pressure with the jockey if you close the pump suction valve? Matt From: Sprinklerforum <[email protected]> On Behalf Of Micah Davis, SET Sent: Friday, June 15, 2018 8:50 AM To: SprinklerForum <[email protected]> Subject: Pump Discharge Piping I have a fire pump installation that is having issues. The contractor has successfully completed a pump startup and test. During a separate follow up visit, the pump technician began having trouble getting the system back up to maintenance pressure after fire pump operation. The discharge piping has an elbow between the pump and the discharge check valve. It was first suggested that this check valve was defective, so it was replaced. The same problem was experienced after this replacement. It has been suggested that the elbow directly after the pump is causing turbulence that is preventing the check valve from closing properly. I can find nothing in NFPA 20 or the handbook to suggest this is a concern. Have any of you seen this? What would your recommendation be? Micah Davis, SET NICET #124745 Water Based Systems Layout, Level IV Dynamic Fire Designs Mail: [email protected]<mailto:[email protected]> Mobile: 931-242-1299 www.dynamicfiredesigns.com<http://dynamicfiredesigns.com> Dynamic Fire Designs • 13063 County Line Rd., Box #87 • Spring Hill • FL • 34609 This message is confidential. It may also be privileged or otherwise protected by work product immunity or other legal rules. If you have received it by mistake, please let us know by e-mail reply and delete it from your system; you may not copy this message or disclose its contents to anyone. The integrity and security of this message cannot be guaranteed on the Internet.
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