Hydrant Flow Test

Record field readings from Little Hose Monster equipment, capture hydrant GPS locations, calculate available fire flow, and plot the water supply curve.

NFPA 291 style workflow Little Hose Monster ready Supply curve GPS recording

Project / site name Address / test location Client / owner

Test date Test time Technician Weather / conditions

Residual / test hydrant ID Flow hydrant ID(s) Main size / direction (optional)

Static / Residual Hydrant

phone GPS

Hydrant ID / asset number Location / nearest intersection

Latitude Longitude GPS accuracy Captured at

GPS not captured yet.

Flowing Hydrant

phone GPS

Hydrant ID / asset number Location / nearest intersection

Latitude Longitude GPS accuracy Captured at

GPS not captured yet.

Municipal Hydrant Map Lookup

Stage 2 ready

Optional: once a municipality's hydrant GIS layer is known, FireCalc can try to match your captured GPS point to the closest mapped hydrant. This depends on the municipality allowing browser access to the data.

Municipality / water system ArcGIS FeatureServer layer URL Use GPS point from Search radius m

Hydrant ID field name (optional) Description field name (optional) Nearest hydrant candidates

Stage 2 is ready for a municipal GIS layer URL.

Gauge use / location

Serial / asset #

Calibration

Range / model / notes

Use this section to document calibrated gauges used for the test, including the residual/static hydrant gauge and any Little Hose Monster / Pitotless Nozzle pressure gauges.

Units Static pressure psi Residual pressure psi Target residual pressure psi

Minimum desired pressure drop % Required / comparison flow (optional) gpm Elevation adjustment (optional) psi

Default target is 20 psi residual. Elevation adjustment can be used to move the plotted supply curve to a project reference elevation; leave 0 for field readings as measured.

Device / method

Velocity / nozzle pressure

K factor or manual flow

Calculated flow

Little Hose Monster Pitotless Nozzle rows use Q = K × √P. Use “Manual flow from chart” when you prefer to enter the manufacturer chart value directly.

Total Test Flow

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Available Flow at Target Residual

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Pressure Drop

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Hydrant Class / Marking

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Flow Margin

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Test Review

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Water Supply Curve

Curve uses the static pressure, residual pressure, and total measured test flow. The target point is calculated at the selected target residual pressure.

Detailed Output

Enter readings and click Calculate & Plot.

Field notes