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Where is a reduced pressure zone backflow preventer (RPZ) used?

April 26, 2017backflow pressure Preventer reduced rpz Used zone

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Where is a reduced pressure zone backflow preventer (RPZ) used?

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An RPZ may be used on all direct connections to the potable water supply which may be subject to back pressure or back-siphonage, and where there is the possibility of contamination by the material that constitutes as a potential health hazard.