Jockey Pump

[olly]

What is the difference between a fire pump and a jockey pump?

 

[JFletcher]

jockey pumps maintain pressure on the system. They are tiny compared to the fire pump.

 

[Jraef]

There are always leaks and losses in a standpipe system so in order to avoid having the eventual pressure drop trigger the big fire pump cycling on and off, a smaller Jockey Pump is used that is triggered at a lower pressure set point.

 

[gadfly56]

There are always leaks and losses in a standpipe system so in order to avoid having the eventual pressure drop trigger the big fire pump cycling on and off, a smaller Jockey Pump is used that is triggered at a lower pressure set point.

Ahhhh, higher. If the fire pump kicks on at 140 psig, you want the jockey pump to come on at 150 psig, or thereabouts.

 

[Jraef]

Ahhhh, higher. If the fire pump kicks on at 140 psig, you want the jockey pump to come on at 150 psig, or thereabouts.

Yeah, right, the OTHER lower... :slaphead: