Finishing worked example

Wash Line Water Usage with pretreatment stage flow rate of 63 gal / hr: a worked example

Push pretreatment stage flow rate up to 63 gal / hr and the picture changes. This example computes every intermediate figure at that operating point. Use this calculator for practical powder coating or surface finishing planning, quoting, troubleshooting, or line setup.

The inputs for this scenario

  • Pretreatment stage flow rate: 63 gal / hr (raised for this scenario; the documented default is 25)
  • Wash line runtime per shift: 8 hr (unchanged)
  • Delivered water cost: 0.75 $ / gal (unchanged)

Working through the calculation

  • Applying the documented formula (Consumption = use rate × runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 504 gal / shift for consumption, the number this scenario is built around.
  • At this operating point the engine returns 378 $ for run cost.
  • At this operating point the engine returns 8 hr for runtime.
  • At this operating point the engine returns 0.75 $ / unit for unit cost.

How this compares with the baseline

  • Against the tool's baseline example, where pretreatment stage flow rate sits at 25 gal / hr and the headline result is 200 gal / shift, this scenario comes in 152% above the baseline at 504 gal / shift.
  • It multiplies a wash or rinse stage's flow rate by shift runtime to give gallons consumed per shift, then multiplies by unit water cost for the run cost. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Consumption: 504 gal / shift (headline result)
  • Run cost: 378 $
  • Runtime: 8 hr
  • Unit cost: 0.75 $ / unit

Run it with your numbers

  • Every input above is editable in the live Wash Line Water Usage calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.