Reference Source

test drafts ≤ 40 L or 10 gal · 0.5 · normal and special tests · 3.30. Liquid-Measuring Devices

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
Accuracy class
0.5 verified
Acceptance tolerance (new or newly repaired device)
one-half the maintenance tolerance values verified
Maintenance tolerance (device already in service)
20 mL plus 4 mL per indicated liter or 1 in3 plus 1 in3 per indicated gallon verified
Condition
normal and special tests verified
Handbook 44 section
3.30. Liquid-Measuring Devices verified
Edition
2026 verified
Sourcenist.gov
Verified
Review by
DatasetHow far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)

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.

nist.gov, retrieved 2026-08-20

Source

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