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ANNEX IIIU.K.

SPECIFIC REQUIREMENTSU.K.

Suitability U.K.

8.1.The meter shall be able to be installed to operate in any position unless clearly marked otherwise.U.K.
8.2.The manufacturer shall specify whether the meter is designed to measure reverse flow. In such a case, the reverse flow volume shall either be subtracted from the cumulated volume or shall be separately recorded. The same MPE shall apply to both forward and reverse flow.U.K.

Water meters not designed to measure reverse flow shall either prevent reverse flow or shall withstand an accidental reverse flow without any deterioration or change in metrological properties.