it's probably a bad bypass check valve. On Fri, Jun 15, 2018 at 10:07 AM Micah Davis, SET <[email protected]> wrote:
> 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] > 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. > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- \ \ (o> -- If life were easy... \ \_/ /) It'd be called your mom... \_/_) _|_
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