Booster Fire Pump without Jockey Pump
Booster Fire Pump without Jockey Pump
(OP)
Hello All,
I am working on a small facility project in which we are installing a wet pipe sprinkler system. In order to meet pressure/flow demands of the system, we are providing a small (750 gpm/50 psi) pump to supplement the available city water supply. I have concluded that we do not need a jockey pump due to the available static pressure in the city water main (98 psi @ 530 gpm), which should be more than adequate to maintain pressure in the system piping. In addition, using the recommended sizing guidelines for a jockey pump provided in NFPA 20H, the recommended size of a jockey pump for this size fire pump is less than what is available from the city suppy (NFPA 20H recommends a jockey pump of 7.5 gpm @ 60 psi).
For these reasons, I have concluded that a Jockey Pump is not required; is there something that I am missing or any error in my logic?
I am working on a small facility project in which we are installing a wet pipe sprinkler system. In order to meet pressure/flow demands of the system, we are providing a small (750 gpm/50 psi) pump to supplement the available city water supply. I have concluded that we do not need a jockey pump due to the available static pressure in the city water main (98 psi @ 530 gpm), which should be more than adequate to maintain pressure in the system piping. In addition, using the recommended sizing guidelines for a jockey pump provided in NFPA 20H, the recommended size of a jockey pump for this size fire pump is less than what is available from the city suppy (NFPA 20H recommends a jockey pump of 7.5 gpm @ 60 psi).
For these reasons, I have concluded that a Jockey Pump is not required; is there something that I am missing or any error in my logic?





RE: Booster Fire Pump without Jockey Pump
RE: Booster Fire Pump without Jockey Pump
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Booster Fire Pump without Jockey Pump
RE: Booster Fire Pump without Jockey Pump
#1. I suggest you have an informal conversation with the Local Fire Marshal about your plan and the reasoning behind it.
#2. Leave space for the Jockey Pump(JP)
#3. Install Valved connections, properly located, sized and type, for the JP suction, JP discharge and the Pressure Sensor Switch.
prognosis: Lead or Lag