What is residual pressure?

[newbie38]

I have searched google and the first hit took me to this web site where there was a thread referring to this question. Call me stupid but I still do not know what residual pressure is in reference to a municipal water system.

 

[bimr]

Residual water pressure: The pressure of water available in a piping system when water is flowing.

 

[newbie38]

Thanks bimr

I am not a civil engineer my background is it. However, the municipality that I work for offered to provide on the job training regarding civil work. We have two civil engineers on staff and we use an engineering firm to do all design and such for our municipality.

Having said that I am trying to get familiar with our design standards and I could not understand residual pressure thanks for helping me out. However, is the definition that you provided not the same is static pressure?

 

[LHA]

No, static pressure is the pressure when water is not flowing, or in a 'static' state.

Most often, both are used with respect to fire flow. Fire flow is a large, instantaneous demand which greatly affects residual. Static pressure is, in that case, not truly in a static state, there is normal domestic demand. It just implies there are no fire hydrants, sprinklers, etc opened.

Engineering is the practice of the art of science - Steve

 

[newbie38]

Thanks for all your help...I now understand residual pressure completely!

 

[newbie38]