# test drafts ≤ 40 L or 10 gal · 0.5 · normal and special tests · 3.30. Liquid-Measuring Devices — How far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)

For test drafts ≤ 40 L or 10 gal · 0.5 · normal and special tests · 3.30. Liquid-Measuring Devices, device or commodity is test drafts ≤ 40 L or 10 gal; accuracy class is 0.5; acceptance tolerance (new or newly repaired device) is one-half the maintenance tolerance values; maintenance tolerance (device already in service) is 20 mL plus 4 mL per indicated liter or 1 in3 plus 1 in3 per indicated gallon; condition is normal and special tests, verified against its source on 2026-08-20.

- **Device or commodity:** test drafts ≤ 40 L or 10 gal _(verified: appears in the quote below)_
- **Accuracy class:** 0.5 _(verified: appears in the quote below)_
- **Acceptance tolerance (new or newly repaired device):** one-half the maintenance tolerance values _(verified: appears in the quote below)_
- **Maintenance tolerance (device already in service):** 20 mL plus 4 mL per indicated liter or 1 in3 plus 1 in3 per indicated gallon _(verified: appears in the quote below)_
- **Condition:** normal and special tests _(verified: appears in the quote below)_
- **Handbook 44 section:** 3.30. Liquid-Measuring Devices _(verified: appears in the quote below)_
- **Edition:** 2026 _(verified: appears in the quote below)_

## What the source says

> * For test drafts ≤ 40 L or 10 gal, the tolerances specified for Accuracy Class 0.5 in the table above do not apply. For these test drafts, the following applies: (a) Maintenance tolerances on normal and special tests shall be 20 mL plus 4 mL per indicated liter or 1 in3 plus 1 in3 per indicated gallon. (b) Acceptance tolerances on normal and special tests shall be one-half the maintenance tolerance values.

## Source

- https://www.nist.gov/document/2026-nist-handbook-44-section-330

Last verified: 2026-08-20. Review by: 2027-08-20.
Part of [How far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)](https://referencesource.org/motor-fuel-dispenser-measurement-tolerances-nist/).