Case study · fictional district
One flush, from field to data
Cedar Valley Improvement District, Ridge Road.
The segment
Three sections,
two sizes
Cedar Valley is fictional. The numbers are real calculations.
- S1 · 150 mm × 120 m2,120 L
- S2 · 200 mm × 200 m6,280 L — the largest main, so it sets the flow
- S3 · 150 mm × 80 m1,413 L
- Total · 400 m9,813 L of water to move
The flush
Plan, run, check
- 1Plan Reaching the 1.5 m/s biofilm scouring target in the 200 mm main takes 2,826 L/min, about 20 psi on a Pollard diffuser. Three water exchanges take about 10.4 minutes.
- 2Run The crew opens the diffuser to 30 psi, giving 3,479 L/min. Velocity is 1.85 m/s in the 200 mm main and 3.28 m/s in the 150 mm sections. Residual pressure holds at 55 psi.
- 3Check Turbidity falls from 3.4 to under 1.0 NTU. Chlorine meets target. Every limit passes, and the record is complete before the truck leaves.
The result
A row of data,
not a sheet in a binder
- Every flush saved with the same fields
- Export to CSV for trends by segment and season
- Failed checks visible at a glance
- Water use per flush, per zone, per year