ABSTRACT

Coffee Break Training: Pressure Maintenance (Jockey) Pumps   [open pdf - 128KB]

"Most stationary fire pump assemblies are installed with devices that automatically sense a pressure loss in a fire protection system, and start running to supply water or boost pressure in that system. From time to time, though, small water leaks, unwanted pressure drops, or even temperature changes may 'fool' the fire pump into starting when it isn't needed. To prevent these false starts and maintain the fire pump's life expectancy, small pressure-maintenance or 'jockey' pumps like the one pictured are installed to maintain a relatively constant pressure on the fire protection system. A jockey pump should be sized to make up the allowable leakage rate within 10 minutes or 1 gpm (3.8 L/min), whichever is larger. Although a centrifugal-type pressure maintenance pump is preferred, NFPA [National Fire Protection Association] 20, 'Standard for the Installation of Stationary Pumps for Fire Protection' allows a domestic water pump in a dual-purpose water supply system (domestic and fire protection) to function as a pressure maintenance pump."

Report Number:
Coffee Break Training - Fire Protection Series No. 2008-7
Publisher:
Date:
2008-02-12
Series:
Copyright:
Public Domain
Retrieved From:
United States Fire Administration: http://www.usfa.fema.gov/
Format:
pdf
Media Type:
application/pdf
URL:
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