RPZ Valves

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Reduced pressure zone backflow preventers

The backflow preventer is a hydraulic protection device designed to prevent polluted water from flowing back into the mains supply network.



This type of backflow may occur when the pressure in the mains supply network changes and causes a reversal of the flow.

The backflow preventer is installed between the mains supply network and the internal consumer circuit in water supply systems and creates a safety zone that prevents the water in the two circuits from coming into contact.



Water RPZ Brochure

SA Brochure Caleffi

Technical and Maintenance



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