Flow test's from multiple hydrants?

[GlorifiedPlumber1984]

Can someone more versed in converting flow tests results walk me through how to interpret some results we received from a water authority?

Specifically, we typically get the static and residual pressure from Hydrant1, get the pitot pressure and coefficient from Hydrant 2, and then use

29.83 x c x d^2 x √p to get our gpm. The results would then be plotted to get our curve or input into our CAD program.

We received a flow test from a water authority however, that used 2 (2.5") outlets on 2 different hydrants, and gave observed flow results from the residual hydrant. My very long question shortened is, how does the "observed flow" factor in, or does it?

 

[cdafd]

My guess

They also did a separate flow test of the residual fire hydrant only??

 

[cdafd]

Should have said I think you can disregard the residual hydrant flow.

They may have flowed two hydrants, because there was very little pressure drop with one.

Some want a per cent age or minimum psi drop.

Some do not like flat line flow tests

 

[stookeyfpe]

The test was performed on both hydrants and based on site conditions, the utility selected the hydrant on New Hampshire Avenue as the flow hydrant. Observed flow is the flow measured by the utility through two 2.5-inch hydrant outlets. I could be completely wrong - you should ask the utility.