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BS EN 12729. Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone. Family B. Type A Ingestion-build-109673 Detail of the use of

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Detail of the use of this proforma is provided in this Recommendation | International Standard

atmospheric humidity and liquid immersion for use in testing solid electrical insulating materials

Technical specifications are given in ISO 1711‑1:2016

description of the protection system

The standard is accompanied by a National Annex

BS EN 12729. Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone. Family B. Type A Ingestion-build-109673 Detail of the use of

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