
Electric heat cable for water pipes is a simple yet effective solution to prevent pipe freezing and bursting during harsh winter months. This type of cable can be easily installed on exposed pipes in unheated areas such as garages, basements, or outdoor faucets.
The cable works by generating heat to maintain a consistent temperature around the pipe, preventing water from freezing. This is especially important for pipes in areas with temperatures that frequently drop below freezing.
In areas with frequent power outages, it's essential to choose a cable that can withstand extended periods without electricity. Look for cables with features like automatic reset or surge protection to ensure your pipes stay protected.
Electric heat cable for water pipes is a low-maintenance solution that can be easily monitored and maintained.
Check this out: How to Keep Water Pipes from Freezing without Electricity
Preventing Frozen Pipes
An integral energy saving thermostat can automatically protect water pipes when the temperature dips with an effective "do it yourself" solution.
You can't rely on insulation alone to prevent pipes from freezing in cold climates, a well-designed and installed pipe freeze protection system is the way to go.
King's self-regulating electric heat trace cables are the solution for exposed water pipes, pumps, and equipment that worry you in winter.
These cables prevent water in pipes, pumps, and other equipment from freezing by adjusting their power output based on the surrounding temperature.
To select the right cable size for metal pipes, use TABLE 1, and for plastic pipes, use TABLE 2.
The power (watts/ft.) of the heating cable required can be found by reading across the table to find the pipe size, then dropping down to the row corresponding to the design air temperature and the thickness of the insulation that will be used.
For a single cable, run it straight along the bottom of the pipe in the 4 or 8 o'clock position, and if two cables are required, attach them at the 4 and 8 o'clock positions.
Self-regulating heating cable, often called pipe trace cable, automatically adjusts heat output based on surface temperature and is ideal for freeze protection and low temperature process maintenance such as water pipe heating.
Curious to learn more? Check out: Water Frozen in Pipes What Do I Do
Choosing the Right Size
Electric heat cables come in various diameters, ranging from 3 to 12 mm. The right size depends on the pipe's diameter and the heat output required.
A 3 mm cable is suitable for pipes up to 12 mm in diameter, providing a heat output of up to 30 watts. This size is ideal for small pipes and areas with limited heat requirements.
For larger pipes, a 6 mm or 12 mm cable is recommended, offering heat outputs of up to 120 watts or 240 watts respectively. These larger cables are perfect for pipes with higher heat demands.
Recommended read: How to Install Heat Cable on Water Pipes
Step 1: What Size Do I Need?
Choosing the right size is crucial for a comfortable and long-lasting fit. To determine the correct size, you need to know your body measurements.
First, measure your waist circumference, which is usually the narrowest part of your torso. This will help you find a size that fits comfortably.

The ideal waist size varies depending on the style of clothing you're looking for. For example, a loose-fitting t-shirt requires a larger waist size than a fitted one.
To give you a rough idea, here are some general guidelines: a small waist size is typically 24-26 inches, medium is 28-30 inches, and large is 32-34 inches.
Knowing your body measurements will also help you choose between different styles. For instance, if you have a smaller waist, you may prefer a more fitted top to balance out your silhouette.
Model Srp - 240V
The SRP-240V model is a great option for pipe freeze protection. It's designed for a variety of applications and can be used on both metal and plastic pipes.
This cable is constructed to prevent overheating and burning out, even when overlapped. It's a big plus in terms of reliability and safety.
The SRP-240V is pre-terminated with a 30-inch cold lead and end-splice, making it ready to install right out of the box. No need to worry about extra work or materials.
Here are some key specs to consider:
- Stops pipe and valve freeze down to -40°F
- 6 Watts/linear foot @ 40°F
- 16 Gauge heating cable bus wire
- ETL certified for USA and Canada
- 2-year limited warranty
I've seen this type of cable work well in a variety of situations, and it's a great choice for those who need reliable pipe freeze protection.
Frequently Asked Questions
Can you use a heat cable on a pex pipe?
Yes, you can use a heat cable on a PEX pipe, but make sure it's adhesive-free. However, additional protection like foam wrap may still be necessary in areas prone to freezing temperatures.
Which is better, heat tape or heat cable?
For tight contours and oddly shaped pipes, heat tape is the better choice. Heat cable is more suitable for larger, straighter pipes.
Sources
- https://www.appleton.emerson.com/en-us/heating-cable-indoor-outdoor
- https://king-electric.com/blog/selecting-the-required-heating-cable-length-for-pipe-trace-freeze-protection/
- https://www.frostking.com/products/heat-cables/automatic-electric-heat-cable-kits
- https://www.frostking.com/support/heat-cables
- https://king-electric.com/product/model-srp-240-volt/
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