A pipe heat cable runs along a water line and goes under insulation to keep the pipe above freezing in a crawl space, a mobile home skirt, a well house or an unheated barn. Cables with a built-in thermostat switch on only near freezing, which keeps the power bill down. Constant-wattage pipe cables have to run straight along the pipe, while self-regulating ones can spiral around valves and fittings. Check the pipe material and diameter each maker allows before you buy, since some cables are for rigid pipe only.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Full ranking 10
- HEATIT 3JHSF 100 ft#1 of 10Full review
A low-cost self-regulating pipe cable with a thermostat, for long runs of pipe or an RV water line.
Amazon $71.99$71.99100 ft$0.72/ftSelf-reg. - VEVOR Self-Regulating Pipe Cable 100 ft#2 of 10Full review
The cheapest way to put self-regulating cable with a thermostat on 100 ft of pipe. It carries no UL, ETL or CSA listing.
Amazon $57.90$57.90100 ft$0.58/ftSelf-reg. - HEATIT JHSF1 150 ft#3 of 10Full review
A long plug-in self-regulating cable for many feet of pipe, which also works on a roof edge with clips bought separately.
Amazon $159.99$159.99150 ft$1.07/ftSelf-reg. - HEATIT 5HTM 100 ft Kit#4 of 10Full review
A bulk self-regulating cable with one plug kit included, for one long custom-length run.
Amazon $111.99$111.99100 ft$1.12/ftSelf-reg. - Easy Heat AHB-160 60 ft#5 of 10Full review
A well-documented 60 ft thermostat pipe cable at a low price per foot, for straight runs of supply pipe.
Amazon $60.49$60.4960 ft$1.01/ftConstant - Wrap-On 31060 60 ft#6 of 10Full review
A low-wattage plug-in pipe cable with a thermostat and a test button, for long rigid supply lines in a crawl space.
Amazon $65.85$65.8560 ft$1.10/ftConstant - HEATIT In-Line Pipe Heat Cable 20 ft#7 of 10Full review
For a buried or hidden water line that can’t be wrapped from outside, such as a lake or spring intake. It costs far more per foot than an external cable.
Amazon $119.99$119.9920 ft$6.00/ftSelf-reg. - Easy Heat Freeze Free 2102 100 ft#8 of 10Full review
A cut-to-length reel for protecting many short pipe runs, such as under a mobile home. Budget for a plug kit per run.
Amazon $208.90$208.90100 ft$2.09/ftSelf-reg. - Frost King SR100 Freeze Free 100 ft#9 of 10Full review
A self-regulating pipe cable reel for several runs of supply and drain pipe. The listing gives no wattage or warranty.
Amazon $141.34$141.34100 ft$1.41/ftSelf-reg. - Frost King HC24A 24 ft#10 of 10Full review
A short thermostat pipe cable for one exposed supply line. Longer cables cost far less per foot.
Amazon $54.42$54.4224 ft$2.27/ftConstant
