# Devices designed to deliver less than 4 L (1 gal) · 1.1 · 3.31. Vehicle-Tank Meters — How far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)

For Devices designed to deliver less than 4 L (1 gal) · 1.1 · 3.31. Vehicle-Tank Meters, device or commodity is Devices designed to deliver less than 4 L (1 gal); accuracy class is 1.1; acceptance tolerance (new or newly repaired device) is 0.75 %; maintenance tolerance (device already in service) is 1.0 %; special test tolerance is 1.25 %, verified against its source on 2026-08-20.

- **Device or commodity:** Devices designed to deliver less than 4 L (1 gal) _(verified: appears in the quote below)_
- **Accuracy class:** 1.1 _(verified: appears in the quote below)_
- **Acceptance tolerance (new or newly repaired device):** 0.75 % _(verified: appears in the quote below)_
- **Maintenance tolerance (device already in service):** 1.0 % _(verified: appears in the quote below)_
- **Special test tolerance:** 1.25 % _(verified: appears in the quote below)_
- **Handbook 44 section:** 3.31. Vehicle-Tank Meters _(verified: appears in the quote below)_
- **Edition:** 2026 _(verified: appears in the quote below)_

## What the source says

> - Petroleum products and other normal liquids from devices with flow rates** less than 4 L/min 1.1 0.75 % 1.0 % 1.25 % (1 gpm) and - Devices designed to deliver less than 4 L (1 gal)

## Source

- https://www.nist.gov/document/2026-nist-handbook-44-section-331

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/).