Consider a taller building where city pressure only gets water up ¾ of the height. Start your pump with a flow switch and you are going to have a heck of a water hammer.
I did think about using flow switches to start the pump on a system where they are 3 dry valves and there is less than 15’ of pipe with water pressure in it. 4 years ago I could not find anything that said there had to be a jockey pump. Best regards, Charles Thurston [email protected] MYRTLE BEACH FIRE SAFETY GROUP A Division of Pye-Barker Fire Safety 1445 Cannon Road Myrtle Beach, SC 29577 (843) 916 - 8787 (843) 839 - 3473 facsimile [cid:[email protected]] From: Sprinklerforum [mailto:[email protected]] On Behalf Of Bruce Verhei Sent: Wednesday, August 29, 2018 10:25 PM To: [email protected] Subject: Re: No Jockey Pump So why do we use jockey pumps? Wouldn’t one of Mike H’s flow switches alway be cheaper? Best. Bruce Verhei On Aug 29, 2018, at 19:05, Larry Keeping <[email protected]<mailto:[email protected]>> wrote: NFPA 20 has never mandated jockey pumps. Back in the cycle for the development of the 1999 edition, in response to Proposal 20-36, the Committee Statement confirmed that “A pressure maintenance pump is not required by the standard. …” For the 2016 edition, some text was added, for the first time, to clarify that pressure maintenance is required for pressure-actuated fire pumps, but a jockey pump is not necessarily required to accomplish the task. Section 4.26.1 (c) allows “Another approved means that is not the main fire pump”. And again, the Committee Statement confirmed “… a pressure maintenance pump may not necessarily be required and that other forms of pressure maintenance may be used. …”. Larry Keeping From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of Thomas Reinhardt Sent: August-29-18 5:15 PM To: [email protected]<mailto:[email protected]> Subject: No Jockey Pump Hi group, Found a 50 yr. old fire pump at a business that didn’t have a jockey pump. Am I missing something. Thanks Tom Reinhardt Fire Inspector/Plan Reviewer Skokie Fire Department 7424 Niles Center Road Skokie, IL 60077 Office: 847-982-5342 [email protected]<mailto:[email protected]> _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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