Reed, Rhetorically, what is the definition of ‘close’ in this instance? I think you are fine to put that valve where appropriate in the configuration anywhere between the tee of the suction piping to within 4 ft along the pipe measured upstream of the exterior wall in an accessible location with appropriate automatic air release vents to remove trapped air at commissioning and appropriate auxiliary drains to remove trapped water during maintenance.
While both Figures A.6.3.1(a) and (b) show this valve immediately downstream of the pump discharge tee, these are in the annex and may not be enforceable. Section 4.20.1.4 indicates that the test header is to be installed “…on an exterior wall or in another location outside the pump room…” Since this valve must be a listed indicating valve per Section 4.20.3.3.1, I believe the intent is similar to that of the pump controller location in relation to the pump drivers per Sections 10.2.1 and 12.2.1 in that the test header valve’s position is to be visible from the vantage point of the fire pump. If your configuration achieves this, I would call it ‘close in line to the pump served’. Hope this helps, Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 [email protected] \ burnsmcd.com<http://www.burnsmcd.com/> 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 *Registered in: MN, PA, & TX **NICET IV - Water-Based Systems Layout From: Sprinklerforum [mailto:[email protected]] On Behalf Of Reed A. Roisum, SET Sent: Tuesday, May 09, 2017 5:46 PM To: [email protected] Subject: Fire Pump Test Header Valve Location I have a pump room where an esteemed colleague suggested I locate the fire pump test header control valve near the test header on the vertical pipe to limit the amount of “dry” pipe. Since the valve would be located near the top of vertical pipe the dry portion of the pipe would drain well and wouldn’t have corrosion issues. However, NFPA 20 says that the valve “shall be at a point in the line close to the pump.” (NFPA 20, 2013 ed. 4.20.3.3.3). I know the valve needs to be at least 4’ from the exterior wall along the pipe for freeze issues, but does anyone know the reason 20 requires that valve be close to the pump? Thanks. Reed Roisum Reed A. Roisum, SET | Karges-Faulconbridge, Inc. | Senior Fire Protection Designer | Fargo, ND | direct: 701.552.9903 | mobile: 701.388.1352 | KFIengineers.com<http://www.kfiengineers.com> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________
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