# Water meters · Annex III · Q2 (included) ≤ Q ≤ Q4, water above 30 °C — Accuracy classes and maximum permissible errors for trade measuring instruments

For Water meters, annex is Annex III; condition is Q2 (included) ≤ Q ≤ Q4, water above 30 °C; maximum permissible error is 3 %, recorded from its source on 2026-09-01.

- **Instrument type:** Water meters _(verified: appears in its own passage below)_
- **Annex:** Annex III _(verified: appears in its own passage below)_
- **Condition:** Q2 (included) ≤ Q ≤ Q4, water above 30 °C _(our reading, not quoted from the source)_
- **Maximum permissible error:** 3 % _(verified: appears in its own passage below)_

## What the source says

> The MPE, positive or negative, on volumes delivered at flowrates between the transitional flowrate (Q2) (included) and the overload flowrate (Q4) is: | 2 % for water having a temperature ≤ 30 °C, | | 3 % for water having a temperature > 30 °C.

## Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

### Instrument type

> ANNEX III WATER METERS (MI-001) The relevant requirements of Annex I, the specific requirements of this Annex and the conformity assessment procedures listed in this Annex, apply to water meters intended for the measurement of volumes of clean, cold or heated water in residential, commercial and light industrial use.

### Annex

> ANNEX III WATER METERS (MI-001)

### Maximum permissible error

> 3 % for water having a temperature > 30 °C.

## Source

- https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032

Last verified: 2026-09-01. Review by: 2027-09-01.
Part of [Accuracy classes and maximum permissible errors for trade measuring instruments](https://referencesource.org/legal-metrology-accuracy-classes/).