No EPDM insulator required Copper on copper eliminates the risk of electrolysis occurring between insert and flange 100% lead free CC series copper flanges available in 150lb Flanges drilled to ANSI B 16.5 Ideal for harsh environments, either in ground or exposed to aggressive atmospheric conditions Suitable for water, gas, steam and other high pressure applications both above and below ground Copper component manufactured to ASME 16.22 Backing flange manufactured to ASTM B16.5