Review on Pre-Assembled 6Ft Self-Regulating Pipe Heating Cable - 120V By HEATIT For Efficient Winter Protection by Matt Schwartz

Good product. Been cold enough that if it didn't work i would know. Install was easy.YOU MUST USE GFI OUTLET. As many others probably did i plugged it in to an outlet inside my house and put ice on the sensing part. Waited, waited, waited. Still room temperature - would not get warm at all. I was very displeased and ready to return it. I remembered reading somewhere else that a gfi was REQUIRED. Tested it in my bathroom with a gfi outlet and it was fully working. I think it is slightly misleading that the power indicator on the cord will light up on any type of outlet. The instructions state a gfi is RECOMMENDED.Great productPoor instructions.