Fire hose cabinet only

[ME.EnGR]

Hi folks,

Just want to confirm if i need a jockey pump when i only have to supply fire hose cabinets for a 4-storey office building. do i need jockey pump when i have automatic-wet or automatic-dry standpipes design? and what if i design a Semi-automatic dry type of standpipe? do i really need a jockey pump?

thanks,

 

[MGXFP]

You only need a jockey pump if you have a fire pump.

I suspect you are asking if the standpipes must be manual or automatic for a 4 story and the answer is 'it depends'.

 

[ME.EnGR]

Hi sir!

The system have a fire pump and the design of the standpipe is a dry type standpipe system (there is no water inside the pipe) it also have its own fire reserve. do i need to add jockey pump? or where do i need to add jockey pump if only standpipes will be the protection of the building? thanks for your help sir.

 

[LCREP]

Will the fire pump start automatically via drop in pressure OR started manually by say the fire department or fire brigade? If automatic starting a jockey pump is required to prevent the fire pump from starting because of say a small leak. An automatic starting fire pump should be connected electronically to the fire department. The jockey pump will prevent false alarms to the FD.

 

[MGXFP]

If the system has a fire pump then you need a jockey pump.

If a fire pump is already there it should have a jockey pump. Refer to NFPA 20 for how to provide a jockey pump.

 

[ME.EnGR]

@LCREP

the fire pump is intended to run if the fdas detects a fire. can this design work? the pipes will be totally empty no air or water inside. i think the designer design the system that way thats why it has no jockey pump.

 

[MatthewJWillis]

What is a "fdas"

 

[chicopee]

ME. Engr, you have to think about the purpose of a jockey pump and LCREP has alluded to it. Also if you have a widely range of pressure changes at the supply side, a jockey pump will control false alarms to the automatic fire protection system.