The AHB series is a complete pipe heating system that is ready to install. Choose the AHB pipe heating system with confidence and count on years of energy-efficient protection from EasyHeat®|||, the leader in residential pipe freeze protection. AHB Electric Pipe Freeze Protection Cables keep water flowing at ambient temperatures down to -40°F by protecting metal and plastic water-filled pipes up to 38mm (1-1/2) in diameter."