The Water-Flex water heater connectors by Eastman are built with high-quality corrugated stainless steel and an epoxy coat. The deep corrugations of the stainless steel provide long-lasting structural support against crushing, kinking, and cracking. The color-coded epoxy coat makes it easy to identify the cold and hot water supply lines. The ends are built from brass with a nickel-plated finish. Built to provide a safe and solid bond that will prevent any disconnects and leaks for many seasons. Lead-Free compliant for potable water use. CSA certified and UPC approved.