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There are two components to the InfoWater Pro Fireflow Run Results, Standard Fireflow Run, and the Design Fireflow Run. Based on which analysis is evaluated different reports will be generated. It is important to understand how each of the reports display output results and how these results may vary based on the constraints specified. 


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Fireflow Standard Report

The first report is a standard fire flow fireflow simulation. This report includes static demand, static pressure, static head, fire-flow fireflow demand, residual pressure, hydrant available flow, and hydrant pressure at available flow. Two additional columns are included when you choose Max. Velocity from Run Manager dialog box.

The fire flow fireflow report contains the same information, regardless if the Minimum Design Pressure design flow calculation is checked or not.

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Static Demand - The nodal demand at the fire flow fireflow simulation timestep. This value corresponds to the baseline demand at the specified timestep.

Static Pressure - The nodal calculated pressure for the static demand at the fire flow fireflow simulation timestep.

Static Head - Node hydraulic grade at the current simulation time step, ft (m).

Fire Flow Demand - The user-specified fire flow fireflow demand at the current node when the hydrant is flowing.

Residual Pressure - The residual pressure at the current junction which includes both the fire flow fireflow demand plus the static demand. This pressure value assumes that only the current hydrant (node) is subjected to the assigned fire demand and that no other fire demands are considered in generating this value.

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Critical Pipe Velocity at Available Flow (optional) - The velocity of the critical Pipe after satisfying the maximum velocity constrain. It will be blank if the velocities of the selected pipe are less than the maximum velocity assigned by user.

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Fireflow Design Report

The fire flow fireflow design report displays the final design flow. 

InfoWater Pro will generate a fire flow fireflow design report that determines the minimum pressures in the critical node searching range and returns a Design Flow to be used as a maximum available fire flow fireflow in order to maintain minimum pressures in the distribution system.

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Total Demand - The total nodal demand at the fire flow fireflow simulation timestep. This value corresponds to the sum of the baseline demand (Static Demand) and the fireflow demand (Fire-Flow Fireflow Demand) for the selected timestep.

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Critical Pipe Velocity at Design Flow (optional) - If Max. Velocity Constraint is checked, InfoWater Pro calculates the maximum flow available at the hydrant while maintaining the user-specified residual pressure and the maximum velocity constraint. This value presents the velocity of the critical Pipe after satisfying the maximum velocity constrain. It will be blank if the velocities of the selected pipe are less than the maximum velocity assigned by user.

Explanation on

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Fireflow Reports 

Fire flows Fireflows are an integral part of the Hydraulic modeling process and provide a means to calibrate your model. Use the InfoWater Pro Fire-flow Fireflow module to analyze existing hydrants or provide recommendations for future build-outs.

In InfoWater Pro, there are four constraints that are applied while conducting fire flowsfireflows.

Constraint 1- The Fire Flow Fireflow demand imposed on each hydrant.

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Constraint 3 - The Minimum Design Pressure that is imposed on the junctions that may be affected when the Hydrant supplies water during a fire-flow fireflow simulation. Include these junctions by assigning them to your Critical Node Searching Range.

Constraint 4 (optional) - The Maximum Velocity Constraint can be additionally assigned on the top of Residual Pressure Constraint. This will affect the fire-flow fireflow analysis and the fire-flow fireflow design.

InfoWater Pro will run your Fire-flow Fireflow analysis and provide you with two reports. The Fire-flow Fireflow Report or the Hydrant report will display the hydrant results. This report includes static demand, static pressure, fire flow fireflow demand, residual pressure, available flow at the hydrant and pressure at the available flow. The Fire-flow Fireflow design report displays the final design flow. The contents of this report are different, depending on whether the Minimum Design Pressure at the bottom of the Fire-flow Fireflow tab of the Run Manager dialog box is checked or not checked.


Fire Flow Fireflow Report Variables
The Fire-flow Fireflow Report summarizes fire-flow fireflow simulation results such as the static demand, static pressure, fire flow fireflow demand, residual pressure, and hydrant available flow, and hydrant pressure at available flow.

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Static Pressure - This represents the static pressure corresponding to the static demand of 200gpm (126.72 psi). Refer to #1 in the Hydrant Graph (see above). This pressure indicated the pressure at the hydrant when it only supplies the Static Demand. The Fire Flow Fireflow Demand for the hydrant is not assigned while calculating the Static Pressure.

Fire Flow Demand - This is the Fire Flow Fireflow demand imposed by the user. 

Residual Pressure - This represents the resulting pressure because of a sum total of the Static Demand and the Fire Flow Fireflow demand (1,200 gpm, 120 psi). Refer to #2 in the Hydrant Graph (see above).

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Fire Flow Design Report
The Fire-flow Fireflow Design Report summarizes fire-flow fireflow simulation results such as the Total Demand, Available Flow at Hydrant, Critical Node ID, Critical Node Pressure, Critical Node Head and Design Flow. InfoWater Pro creates the Fireflow Design Report only if the Minimum Design Pressure option under the Design Flow Calculation section of the FireFlow tab in the Run Manager dialog box is checked.

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Total Demand - The total nodal demand at the fire flow fireflow simulation timestep. This value corresponds to the sum of the baseline demand (Static Demand) and the fireflow demand (Fire-Flow Demand) for the selected timestep (12,00 gpm). Refer to #2 in the Hydrant Graph (see above).

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