Stainless steel corrugated water heater connectors are much more flexible than their copper counterparts, providing an easy, kink-free installation every time. As an added feature, they come with a built-in dielectric sleeve, eliminating the need for a separate dielectric union. IAPMO and NSF listed. California and Vermont lead-free compliant. Manufactured to include no more than 0.25% weighted average lead content on wetted surfaces.