Pipe Flow Calculations Forum

You must tell me pipe diameter, pipe length, elevation difference between street pipe and sprinkler end.

If you have same inlet collector and same outlet collector for all pipes, than as pressure can be only one in each collector, pressure drop is the same in every pipe of paralell system.
Actual flow rate through each pipe is different based on the each pipe resistance.

You should use hydraulic diameter Dh=4A/P

A - cross section area
P - wetted perimeter

With Dh you should use Bernoulli equation to calculate pressure drop

You can either use ventilator or increase pipe diameter to reduce pressure drop but it should be checked

Yes

Here is the report that I have using pressure drop calculator Calculation report Pipe pressure drop calculator 1. volume flow rate (q): q : 2058.0613 gpm US 3. pipe length (L): L : 1500 ft 4. pipe diameter (D): D : 7 in 5. pipe roughness (kr): kr : 0.01 mm 6. density (ρ): ρ : 1000 kg/m3 7. kinematic...

What is the height difference between free water level and pump inlet. If pump is bellow water level, than it is ok to use 3" or even smaller pipe. If pipe is high from water level than it should be checked. Anyway, for 2000 gph velocity is ok for both 4" and 3" pipe (less than 0.5 m/...

Well you can not have negative absolute pressure, might be your gauge is not accurate for low pressure readings. Your pump might be able to give 148 feet head, actual pump working pressure is just enough to over come all friction losses plus gravity head difference between to tanks level. If both ta...

Hope orifice plate calculator can help. Use absolute pressures in calculations.

That is OK.
Here you can find diameter and flow calculator that can help you in calculations.