what are the monthly expense to run

To update Mike's answer for 2022. 7 watts per foot @ 30ft = 210watts. Divide by 1,000 = .21kW x 24 hrs = 5.04 kWh per day x cost of electricity in your area (this ranges from $0.2254 to $0.0937 depending on your state) so it could range anywhere from ~$0.47 to ~$1.14.

Can this be used on pex plastic pipe?

You can use it on plastic pipe if the pipe will always be filled with water, but don't wrap it - just run a straight line. See the Frost King website: http://www.frostking.com/wp-content/uploads/Pipe_heat_cable_trifold.pdf

is it thermostat controlled and if not, at what temperature will it be activated? there is existing pipe insulation can the cable go on top of it?

Frost King HC6A 6 Feet Automatic Electric Heat Cable Kits, Black Keep your pipes from freezing in the winter. With a built-in thermostat, the Frost King Electric Heat Cable Kit automatically keeps your water pipes from freezing. No more frozen pipes! For use on 2 in. metal and plastic water pipes. Keeps water flowing down to -40 degrees Fahrenheit. Plug has a power indicator light.

Is it safe to have the cable wrap the pipe inside a foam pipe insulator cover, or will it melt the foam insulator?

I ABSOLUTELY had it melt foam insulator before. Do NOT overlap it. I have pics of where it burned through foam pipe insulator because I sued contractor for almost catching my home on fire

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Reviews

J**Y

Fantastic product, Indicator light is great!

Fantastic product, works as described. Helps keep my water manifolds at a site less prone to freezing when the weather gets colder. Love that they have a power indicator when in use and the thermostat seems to be spot on when I've been using it with our plumbing.

10.12.2025

T**E

Install properly to avoid fire.

They work well. My pipes freeze each winter, but not this year with the cables. I did have about 4 extra inches of lead on my cold water line. The cable does not double up on itself, and I put fire proof plating below it in the unlikely even that it were to sag to the wood when it got hot. I am very pleased with this product.

21.01.2026

M**L

Happy Customer

Works great. Our well kept freezing up, no longer a problem. I also combined this with the frost king insulation. I would suggest reading the installation booklet. I see some review pics where the heat tape was obviously installed wrong. (You are not supposed to coil it around the pipe) Plus the black sensor is to be placed against the pipe.

20.01.2026

T**E

Great product I used it before works grest

I’ve used these before very reliable and works great but had to return this one I ordered the wrong size my bad

22.12.2025

J**.

Good quality product.

I live in Frazier Park and my plumber said I need to replace my heat strip on my water line. It was easy to install and is a good quality product, I recommend buying it and it is reasonably priced. I have used other Frost King products and I have never been disappointed...

16.01.2026

A**3

Good to Go

Installed on wellhead that has box w insulation over it and exterior freeze-proof faucet, so far so good. I like that it's not too cutesy w no elaborate controls ("press twice and hold for menu, press again for...") it's just on when you plug it in, plug and go

27.12.2025

S**E

Performs well, not an adjustable length so measure accurately of what length Frost King you need

Very good heat kit. I used to use the Frostex heat kit, used them for many years, but there expensive and their controller cannot get wet. This Frost King is waterproof which is a big plus. This Frost King does Not have an adjustable wire length, you could cut the Frostex to fit but not these Frost Kings, so get an accurate measurement of what length you need. I had installed a 12-foot Frost King but it turned out to be too long, I had to remove it and install this 9 footer.

3.01.2026

M**C

Product works well

Easy to use and easy to install. Temps hit single digits within a week of installation and it worked great!

19.12.2025

Brand	Frost King
Color	Black
Item Length	360 Inches
Material	Stainless Steel
Voltage	120 Volts
Wattage	7 watts

Frost King HC30A Automatic Electric Heat Kit Heating Cables, 30 - Feet, Black

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