Suitable for use on plastic and metal water pipes( including inlet pipe,drain pipe, sewer, palm tree frost protection etc). Industrial grade self regulating heating cable. The cable output will adjust automatically based on the ambient temperature at each point along the cable. No worry about the overheat risk. More Safe. Can be used by straight, spiral and overlap. More functional. | Smart plug with indication light to show you whether the cable is working or not. Protect pipes up to 2 1/2” in diameter. For a better freeze protection, at least 1/2 inch thick or thicker insulation material is recommended, especially for extremely cold weather. If the ambient temperature is lower than -20°F(-29°C), please use 1” thick insulation material. ETL approved. 50 degrees F for pipe freeze protection.3 ft 18/3 cold lead with grounded plug. | Roof deicing application: HEATIT JHSF1 was designed to prevent the ice dam formation not to melt the ice dams which were already formed. Please turn on the cable at the beginning of snowing. Can be used on flat roofs, metal roofs, asphalt roofs, rubber roofs, slate roofs, stone roofs, metal roofs, ceramic roofs, composite (tar and gravel) roofs and so on. Rated 10W/ft at 32°F (0°C) for roof deicing. For roof deicing application, you may need to buy clips and hangers separately. | Designed to maintain water temperature in the supply piping system, reducing or eliminating the delay in obtaining hot water at each fixture. You don’t need to run showers or sinks for long periods of time to draw new hot water into the unit, which is a significant waste of water. Simply wrap the self regulating heating cable around your hot water lines within the house to provide you with instant hot water. It is an energy efficient and economical alternative to common re-circulation systems. | Testing the cable before the installation. Uncoil the cable, plug in the heating cable. Normally you can feel the slight warm on the heating cable in few minutes.