As the need for freeze protection of municipal water sources expand, Heat-Line is pleased to offer the first municipal water pipe freeze protection solution. CARAPACE is a self-regulating heated water supply pipe and is an excellent and cost effective alternative to blasting, excavating or where burying below the frost line is cost prohibitive. CARAPACE is constructed out of high density polyethylene pipe making it suitable for use not only in municipal applications, but also in constant pressure systems.