EasyHeat AHB 30-ft 210-Watt Pipe Heat Cable in the Pipe Insulation department at Lowes.com
Wrap-On Pipe Heating Cable
6 Foot Pipe Heating Cable, Turns On and Off Automatically Using Built-in Thermostat, Protects Pipes from Freezing, 120V, 42W - by EX ELECTRONIX EXPRESS - - Amazon.com