Water Meter Sizing from Peak Demand
Adequate/undersized verdict, percent of the meter's normal-flow rating used, and the headroom.
Example
You enter
- Peak demand (gpm) 30
- Meter normal-flow rating (gpm) 50
- Meter peak-flow rating (gpm, optional) 100
You get
- Percent of normal rating used 60%
- Headroom 20.0 gpm
Checked against published worked examples from: AWWA M22 / C700-series.
Details, formula, and sources
ScopePer AWWA M22 and the C700-series; meter flow ranges are user-supplied for the candidate size.
Formula or tableAdequate if peak demand <= the meter's normal-flow rating at the available pressure loss; percent used = peak / normal x 100; headroom = normal - peak; flag if peak exceeds the peak-flow rating.
Source and editionAWWA M22 (Sizing Water Service Lines and Meters) and the AWWA C700-series meter standards, by name.
Free accessAWWA-published; guidance summaries free at awwa.org. Meter flow ranges user-supplied for the candidate size.
What governsEstimate. Operator of record and primacy agency govern.
API field namespeak_demand_gpm, normal_rating_gpm, peak_rating_gpm, percent_used, headroom_gpm
- Flow ranges normal and peak flow ratings user-supplied for the candidate meter size/classAWWA M22 / C700-series