The Eltherm® ELSR-MA-BF micro self-regulating heating cable is designed to provide in-pipe freeze protection of potable domestic water supply systems. The unique, small diameter cable design ensures a safe and reliable installation inside the water supply pipe. The cable outer jacket material is NSF approved food-safe and meets all applicable standards for use in potable water systems. This versatile cable is simple to install and cost effective with minimal modifications to existing pipe works.