Caleffi 574050A - 3/4" FNPT RPZ Testable Back Flow Preventer

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The backflow preventer can be used in all systems where there is danger of the potable water supply system being contaminated. It prevents an accidental reduction in the pressure in the distribution system from causing backflow from contaminated water in user installations. The valve is ICC-ES certified to ASSE 1013, CSA B64.4 and NSF 372 low lead laws. It meets codes IPC, IRC and UPC for use in accordance with the US and Canadian plumbing codes.