Cast iron
- C lower
- 130
- C upper
- 140
- Selected C scenario
- 130
More dimensions
- Loss multiple vs C150 lower
- 1.136 ×
- Loss multiple vs C150 upper
- 1.303 ×
VALICALC · TECHNICAL REFERENCE
Hazen-Williams C-Factor Chart
Compare EPA new-pipe C-factor ranges and relative head-loss sensitivity. Choose a disclosed scenario value for the existing Hazen-Williams calculator.
SELECT YOUR CONDITIONS
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
Plastic
- C lower
- 140
- C upper
- 150
- Selected C scenario
- 140
All fields & cell provenance
- Loss multiple vs C150 lower
- 1 ×
- Loss multiple vs C150 upper
- 1.136 ×
- New pipe material: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06 · source value Plastic.
- C lower: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06 · source value 140.
- C upper: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06 · source value 150.
- Selected C scenario: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06.
- Loss multiple vs C150 lower: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06.
- Loss multiple vs C150 upper: EPANET hydraulic input coefficients — Table 3.2, new pipe; authored equal-flow/bore loss ratios · verified 2026-10-06.
v1.2.0 · verified 2026-10-06 · values use the valid conditions shown above
Use this value
Review the selected values and units in the calculator before applying them.
Use selected C-factor scenario →Continue your workflow
Hazen-Williams Calculator →Plastic140Back to answer ↑
Explore the verified data
5 matching rows · 5 in this subset
| New pipe material | C lower | C upper | Selected C scenario | Actions |
|---|---|---|---|---|
| Cast iron | 130 | 140 | 130 | |
| Concrete / lined concrete | 120 | 140 | 120 | |
| Galvanized iron | 120 | 120 | 120 | |
| Plastic | 140 | 150 | 140 | |
| Steel | 140 | 150 | 140 |
Concrete / lined concrete
- C lower
- 120
- C upper
- 140
- Selected C scenario
- 120
More dimensions
- Loss multiple vs C150 lower
- 1.136 ×
- Loss multiple vs C150 upper
- 1.512 ×
Galvanized iron
- C lower
- 120
- C upper
- 120
- Selected C scenario
- 120
More dimensions
- Loss multiple vs C150 lower
- 1.512 ×
- Loss multiple vs C150 upper
- 1.512 ×
Plastic
- C lower
- 140
- C upper
- 150
- Selected C scenario
- 140
More dimensions
- Loss multiple vs C150 lower
- 1 ×
- Loss multiple vs C150 upper
- 1.136 ×
Steel
- C lower
- 140
- C upper
- 150
- Selected C scenario
- 140
More dimensions
- Loss multiple vs C150 lower
- 1 ×
- Loss multiple vs C150 upper
- 1.136 ×
How to use this data
Pick a scenario within the source interval. At fixed geometry and flow, head loss scales as C^-1.852, so relative loss versus C150 is (150/C)^1.852.
CHECK THE METHOD
Worked example
Plastic C140–150 gives relative head loss of 1.0–about 1.137 against C150 at otherwise identical inputs.
Related calculators
Continue the reference workflow
Common lookup questions
Can I use these values as a universal specification?
C is empirical, condition-dependent and water-oriented. These new-pipe ranges are not guaranteed values for aged networks or arbitrary fluids.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.2.0
Last verified:
Five selected new-pipe examples, with authored sensitivity ratios at equal flow/length/bore.
Values are curated product facts or generated scenarios. Paid standards, complete catalogs and source diagrams are not reproduced. A verification date applies to this documented subset.
EPANET hydraulic input coefficients ↗
Type B · US EPA · EPANET 2.2; EPA/600/R-20/133, 2020
Selected government-authored engineering facts; source conditions are retained.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- public-domain
- Artifact SHA-256
- No retained source artifact hash; see the stated source and verification record.