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Double check valve with controllable reduced pressure zone. Type BA (UNI EN 1717). Protection from fluids category 1, 2, 3, 4 (UNI EN 1717). UNI EN 12729 compliant. . Bronze main body and lids. Maximum operating temperature 65 °C. Maximum working pressure 10 bar. Complete with upstream, intermediate and downstream pressure tappings and discharge funnel with fixing collar for the pipe. 3/4” male threaded union connections